Post on 05-Jan-2016
Let Me See You 1-2 StepTwo-Step Algebraic Equations
Today’s VocabularyToday’s Vocabulary
Two-Step Equations
Coefficient
Constant
Two Step EquationsTwo Step Equations
Two-Step Equations are equations that require two-steps to solve.You will ADD or SUBTRACT and then
MULTIPLY or DIVIDE.
33xx + 8 = 29 + 8 = 29
CoefficientCoefficient
Coefficient – The number that is attached to a variable
33xx + 8 = 29 + 8 = 29CoefficientCoefficient
CoefficientCoefficient
To get rid of the coefficient, you will either MULTIPY or DIVIDE
ConstantConstant
The constant is the number that is not attached to a variable.It MUST be on the same side of the equal sign
as the variable.
33xx + + 88 = 29 = 29CoefficientCoefficient ConstantConstant
ConstantConstant
To get rid of the constant, you will either ADD or SUBTRACT
You get rid of the constant FIRST!!
4x + 12 = 20
6x + 3 = 154
-17x + 2 = -8
5x + 15 = 24 -7x - 11 = 33
4x - 13 = -63
-8x + -12 = -20
Label the Coefficient and the Label the Coefficient and the ConstantConstant
How do I solve two-step equations?How do I solve two-step equations?
To solve two-step equations, you do order of operations in REVERSE
This means that you do addition or subtraction FIRST
Reverse order of Reverse order of operations? What does operations? What does
that mean? Isn’t there an that mean? Isn’t there an easier way to understand easier way to understand
this?this?
How do I solve two-step equations?How do I solve two-step equations?
To solve two-step equations, you get rid of the constant FIRST
This means that you do addition or subtraction FIRST
4x + 12 = 284x + 12 = 28
Two-Step EquationsTwo-Step Equations
Which number do I “get rid of” first?
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
3x - 5 = 73x - 5 = 7
Two-Step EquationsTwo-Step Equations
Which number do I “get rid of” first?
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
6x + 12 = 246x + 12 = 24
Two-Step EquationsTwo-Step Equations
Which number do I “get rid of” first?
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
-2x - 4 = 10-2x - 4 = 10
Two-Step EquationsTwo-Step Equations
What number do I “get rid of” next?
What operation do I do?
2x + 4 = -102x + 4 = -10
Two-Step EquationsTwo-Step Equations
Which number do I “get rid of” first?
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
-5x + 12 = 32-5x + 12 = 32
Two-Step EquationsTwo-Step Equations
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
-3x + 6 = 27-3x + 6 = 27
Two-Step EquationsTwo-Step Equations
Which number do I “get rid of” first?
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
-9x + 9 = -18-9x + 9 = -18
Two-Step EquationsTwo-Step Equations
What operation do I do?
What number do I “get rid of” next?
What operation do I do?
6x + 12 = 186x + 12 = 18
Two-Step EquationsTwo-Step Equations
5x - 15 = 205x - 15 = 20
Two-Step EquationsTwo-Step Equations
-8x + 10 = 42-8x + 10 = 42
Two-Step EquationsTwo-Step Equations
-15x - 5 = 40-15x - 5 = 40
Two-Step EquationsTwo-Step Equations