2x - 8y = 22
-2(x + 7y = 0)
2x - 8y = 22
-2x - 14y = 0
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-22y = 22
y = -1
substitute y into one of the previous equations to find x.
x + 7y = 0
x + 7(-1) = 0
x - 7 = 0
x = 0 + 7
x = 7
(-7, -1)
Check.
7 + 7(-1) = 0
7 - 7 = 0
2(7) - 8(-1) = 22
14 + 8 = 22
hope this helps :)
