Question

A variable needs to be eliminated to solve the system of equations below. Choose the correct first step. -3x+2y - 3x-6y = 9

A) Subtract to eliminate y.
B) Add to eliminate x.
C) Subtract to eliminate x.
D) Add to eliminate y.​

Answer 1

B

Explanation:

-3x + 2y = ? You forgot to put what this equals, but it does not matter.

3x + 6y = 9

9y = ?

When we add -3x and 3x the x's drop out.