Use elimination to solve the the system of equations given by 10x-4y=-20

Question

and 10x-5y=35.
I can't figure this one out. Whenever I check my work, it is incorrect.

Answer 1

when I subtract the last equation from the first, I get

y = -55
sub that back into the first
10x -4(-55) = -20
10x + 220 = -20
10x = -240
x = -24

(those values verify in both equations)

Answer 2

Thank you! You were a lot of help!

Answer 3

-6x+5y=1 6x+4y=-10