3 systems elimination ADDSUB only 2017­2018.notebook March 08, 2018

Yipee! It's "systems of equations"!

your teacher...lol

Is (14, 5) a solution for

x + 14y = 84 2x ­ 7y = ­7

Solving Systems:

Linear Combination/Elimination How do I put an equation in STANDARD FORM???

your teacher...lol

What is STANDARD FORM?

Ax + By = C

...basically x and y are togehter on the same side of the equal sign.

Example:

4x ­ 6 = 8y

3 systems elimination ADDSUB only 2017­2018.notebook March 08, 2018

Solving by elimination: JUST WATCH!!!

*elimination is sometimes called combinations or addition method.

2x ­ 3y = ­1­2x + 2y = ­2 ~ look for same coefficient with

opposite signs on like variables

~ stack equations with variables aligned

~ combine the equations, eliminating one of the variables

~ substitute back into one of the equations to get other variable

1.)

­8x ­ 2y = 0 x + 2y = ­7

~ look for same coefficient with opposite signs on like variables

~ stack equations with variables aligned

~ combine the equations, eliminating one of the variables

~ substitute back into one of the equations to get other variable

Now you try...2.)

3 systems elimination ADDSUB only 2017­2018.notebook March 08, 2018

3x + 2y = 7­3x + 4y = 5

3.)