Question

3x - y - 7

6x - y - 10
When solving this system of equations by elimination, which could be the resulting equation when a variable has been eliminated?
-)))
A)
9x - 2y - 17
B)
-3y - 24
0
-3x - 3
D)
9x - 17

Answer 1

3x-y-7 - 6x-y-10 would leave you with -3x-3

Explanation:

When subtracting 6x-y-10 from 3x-y-7, 3x - 6x would leave you with -3x. -y and -y would cancel out. lastly, -7 - (-10) is equal to -3. When putting all of this together, you are left with -3x-3.