Module 6 End-Chapter Practice 8th Grade

What operation is used to ELIMINATE a variable?

The coefficients of the eliminated variable must be _____.

When solving for $$y$$ , the coefficients of __ need to be opposites.

When solving for $$x$$ , the coefficients of __ need to be opposites.

What operation is used to manipulate equation to have OPPOSITE coefficients?

To get opposite coefficients, multiply ____.

To find the second variable, substitute into ____.

Order the algorithm (steps) to elimination

Solve the system of equations using elimination.

 $-7x+4y=-9$  

Solve the system of equations by elimination.
 $3x-3y=4$  

 $-3x+3y=3$