A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.

Question

minus, 9, x, minus, 4, y, equals, 20
−9x−4y=
20
x, plus, 4, y, equals, 12
x+4y=
12
Answer
Multiple Choice Answers
A, d, d, to eliminate , y, .Add to eliminate y.
S, u, b, t, r, a, c, t, to eliminate , x, .Subtract to eliminate x.
S, u, b, t, r, a, c, t, to eliminate , y, .Subtract to eliminate y.
A, d, d, to eliminate , x, .Add to eliminate x.

Answer 1

To eliminate y, we need to subtract the equations. So, the correct first step is:

Subtract to eliminate y.