Question

solve the system by the addition/linear combination method. be sure to check all proposed solutions.
x-4y=-10
9x-5y=34

Answer 1

Multiply the first equation by 9

9x - 36y - 90
9x - 5y = 34

Then then subtract the second from the first to get:

-31y = -124

Divide both sides by -31 to get
y = -124/-31
y = 4

Now go back and find x