Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Equations - Revision

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

What are Equations?

What are equations?

Sets of mathematical expressions which are equal

Don’t look the same

Contain different numbers and terms

Have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

What are Equations?

What are equations?

Sets of mathematical expressions which are equal

Don’t look the same

Contain different numbers and terms

Have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

What are Equations?

What are equations?

Sets of mathematical expressions which are equal

Don’t look the same

Contain different numbers and terms

Have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

What are Equations?

What are equations?

Sets of mathematical expressions which are equal

Don’t look the same

Contain different numbers and terms

Have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

What are Equations?

What are equations?

Sets of mathematical expressions which are equal

Don’t look the same

Contain different numbers and terms

Have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

What are Equations?

What are equations?

Sets of mathematical expressions which are equal

Don’t look the same

Contain different numbers and terms

Have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

An example

E = mc2

Equation – “equals” sign!

Two sides look different

But if true, both sides have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

An example

E = mc2

Equation

– “equals” sign!

Two sides look different

But if true, both sides have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

An example

E = mc2

Equation – “equals” sign!

Two sides look different

But if true, both sides have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

An example

E = mc2

Equation – “equals” sign!

Two sides look different

But if true, both sides have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

An example

E = mc2

Equation – “equals” sign!

Two sides look different

But if true, both sides have the same value

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Analogue

Equations can be compared to a balance

Tonne of feathers and tonne of bricks

Don’t look the same

But have the same weight

Would balance a set of scales

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Analogue

Equations can be compared to a balance

Tonne of feathers and tonne of bricks

Don’t look the same

But have the same weight

Would balance a set of scales

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Analogue

Equations can be compared to a balance

Tonne of feathers and tonne of bricks

Don’t look the same

But have the same weight

Would balance a set of scales

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Analogue

Equations can be compared to a balance

Tonne of feathers and tonne of bricks

Don’t look the same

But have the same weight

Would balance a set of scales

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Analogue

Equations can be compared to a balance

Tonne of feathers and tonne of bricks

Don’t look the same

But have the same weight

Would balance a set of scales

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Analogue

Equations can be compared to a balance

Tonne of feathers and tonne of bricks

Don’t look the same

But have the same weight

Would balance a set of scales

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Equations usually contain at least one unknown value

e.g. x + 3 = 7 x is unknown

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Equations usually contain at least one unknown value

e.g. x + 3 = 7 x is unknown

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Equations usually contain at least one unknown value

e.g. x + 3 = 7

x is unknown

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Equations usually contain at least one unknown value

e.g. x + 3 = 7 x is unknown

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Solving an equation is the process of finding the unknown value

Solve x + 3 = 7

means find the value of x

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Solving an equation is the process of finding the unknown value

Solve x + 3 = 7

means find the value of x

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Solving Equations

Solving an equation is the process of finding the unknown value

Solve x + 3 = 7

means find the value of x

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

How to solve equations

To solve an equation we need:

Unknown letter on one side of the equation

Numbers on the other side of the equation

Golden Rule of Equation Solving

Always do the same thing to both sides!

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

How to solve equations

To solve an equation we need:

Unknown letter on one side of the equation

Numbers on the other side of the equation

Golden Rule of Equation Solving

Always do the same thing to both sides!

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

How to solve equations

To solve an equation we need:

Unknown letter on one side of the equation

Numbers on the other side of the equation

Golden Rule of Equation Solving

Always do the same thing to both sides!

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

How to solve equations

To solve an equation we need:

Unknown letter on one side of the equation

Numbers on the other side of the equation

Golden Rule of Equation Solving

Always do the same thing to both sides!

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

How to solve equations

To solve an equation we need:

Unknown letter on one side of the equation

Numbers on the other side of the equation

Golden Rule of Equation Solving

Always do the same thing to both sides!

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

How to solve equations

To solve an equation we need:

Unknown letter on one side of the equation

Numbers on the other side of the equation

Golden Rule of Equation Solving

Always do the same thing to both sides!

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve x + 3 = 7

x + 3 = 7

x + 3/− 3/ = 7− 3 numbers on right only

x = 7− 3

x= 4

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve x + 3 = 7

x + 3 = 7

x + 3/− 3/ = 7− 3 numbers on right only

x = 7− 3

x= 4

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve x + 3 = 7

x + 3 = 7

x + 3/− 3/ = 7− 3 numbers on right only

x = 7− 3

x= 4

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve x + 3 = 7

x + 3 = 7

x + 3/− 3/ = 7− 3 numbers on right only

x = 7− 3

x= 4

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve x + 3 = 7

x + 3 = 7

x + 3/− 3/ = 7− 3 numbers on right only

x = 7− 3

x= 4

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve x + 3 = 7

x + 3 = 7

x + 3/− 3/ = 7− 3 numbers on right only

x = 7− 3

x= 4

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, x − 5 = 2

x − 5/ + 5/ = 2 + 5

x = 2 + 5

x= 7

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, x − 5 = 2

x − 5/ + 5/ = 2 + 5

x = 2 + 5

x= 7

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, x − 5 = 2

x − 5/ + 5/ = 2 + 5

x = 2 + 5

x= 7

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, x − 5 = 2

x − 5/ + 5/ = 2 + 5

x = 2 + 5

x= 7

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, x − 5 = 2

x − 5/ + 5/ = 2 + 5

x = 2 + 5

x= 7

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, x − 5 = 2

x − 5/ + 5/ = 2 + 5

x = 2 + 5

x= 7

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 2x = 18

2/x

2/=

18

2

x =18

2x= 9

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 2x = 18

2/x

2/=

18

2

x =18

2x= 9

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 2x = 18

2/x

2/=

18

2

x =18

2x= 9

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 2x = 18

2/x

2/=

18

2

x =18

2

x= 9

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 2x = 18

2/x

2/=

18

2

x =18

2

x= 9

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 2x = 18

2/x

2/=

18

2

x =18

2x= 9

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 3n = 17

3/n

3/=

17

3

n =17

3

n = 52

3

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 3n = 17

3/n

3/=

17

3

n =17

3

n = 52

3

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 3n = 17

3/n

3/=

17

3

n =17

3

n = 52

3

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 3n = 17

3/n

3/=

17

3

n =17

3

n = 52

3

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 3n = 17

3/n

3/=

17

3

n =17

3

n = 52

3

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 4x + 3 = 23

4x + 3/− 3/ = 23− 3

4x = 20

4/x

4/=

20

4

x= 5

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 4x + 3 = 23

4x + 3/− 3/ = 23− 3

4x = 20

4/x

4/=

20

4

x= 5

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 4x + 3 = 23

4x + 3/− 3/ = 23− 3

4x = 20

4/x

4/=

20

4

x= 5

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 4x + 3 = 23

4x + 3/− 3/ = 23− 3

4x = 20

4/x

4/=

20

4

x= 5

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 4x + 3 = 23

4x + 3/− 3/ = 23− 3

4x = 20

4/x

4/=

20

4

x= 5

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Examples

Solve, 4x + 3 = 23

4x + 3/− 3/ = 23− 3

4x = 20

4/x

4/=

20

4

x= 5

Equations -Revision

Basics

What are. . . ?

Example

Analogue

SolvingEquations

Meaning

Method

Examples

Your Turn

Your Turn

Page 171, Exercise 1Question 1 (o)-(r)Question 2 (o)-(r)Question 3