A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
minus, 9, x, plus, 4, y, equals, 17
−9x+4y=
17
9, x, plus, 7, y, equals, 5
9x+7y=
5
Answer
Multiple Choice Answers
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 , y, .Add to eliminate y.
A, d, d, to eliminate , x, .Add to eliminate x.
To eliminate the variable x, we can subtract the first equation from the second equation.
9x+7y=5
-(−9x+4y=17)
_________________
9x+7y-(-9x+4y)=5-17
This results in eliminating the x variable, so the correct first step is to subtract to eliminate x.