Answer:
y=9 x=-9
Step-by-step explanation:
Multiply the first equation by 7 and the second by 10 so that x has the same coefficient.
-70x-56y=126
70x+90y=180
Then add these two equations to get:
34y=306
Divide by 34 and y=9
Substitute back into the equations (from your question would be easiest). I chose the second and x=-9
