Explanation:
what is the question ?
to solve this system of 2 equating in 2 variables ?
if so, we start by adding both equations :
-7x + 6y = 34
7x + 4y = -24
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0 + 10y = 10
y = 1
with that we go into one of the original equations (it did not matter which one, I like the second better) :
7x + 4Ă—1 = -24
7x + 4 = -24
7x = -28
x = -4