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?

Answer 1

first you have to get rid of a variable:

1) 3x-y = 7
2) 6x -y =10

multiplying by -1 the second equation, we have:

3x - y = 7
-6x + y = -10 now adding them up

-3x +0 = -3

Answer 2

@calvinbenning now solve for x, and then replace the value of x on the equation 1) or 2)
to find the value of Y

Answer 3

Do you know how to do that ?