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-4(2y+7)=12
We move all terms to the left:
-4(2y+7)-(12)=0
We multiply parentheses
-8y-28-12=0
We add all the numbers together, and all the variables
-8y-40=0
We move all terms containing y to the left, all other terms to the right
-8y=40
y=40/-8
y=-5
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