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?

Manipulate equations so that like terms are ____.

Look for ____ when determining which variable to eliminate.

To get opposite coefficients, multiply ____.

To find the second variable, substitute into ____.