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-4=2y+30
We move all terms to the left:
-4-(2y+30)=0
We get rid of parentheses
-2y-30-4=0
We add all the numbers together, and all the variables
-2y-34=0
We move all terms containing y to the left, all other terms to the right
-2y=34
y=34/-2
y=-17
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