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7(y-4)=-84
We move all terms to the left:
7(y-4)-(-84)=0
We add all the numbers together, and all the variables
7(y-4)+84=0
We multiply parentheses
7y-28+84=0
We add all the numbers together, and all the variables
7y+56=0
We move all terms containing y to the left, all other terms to the right
7y=-56
y=-56/7
y=-8
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