Answer:
(7,-1)
Step-by-step explanation:
4x + 8y = 20
-4x+2y=-30
Add the two equations together to eliminate x
------------------------
10y = -10
Divide each side by 10
10y/10 = -10/10
y=-1
Now we need to find x
4x+8y = 20
4x+8(-1) = 20
Add 8 to each side
4x +8-8=20+8
4x = 28
Divide each side by 4
4x/4 =28/4
x =7
(7,-1) or x=7 and y=-1
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