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4=y/2-2
We move all terms to the left:
4-(y/2-2)=0
We get rid of parentheses
-y/2+2+4=0
We multiply all the terms by the denominator
-y+2*2+4*2=0
We add all the numbers together, and all the variables
-1y+12=0
We move all terms containing y to the left, all other terms to the right
-y=-12
y=-12/-1
y=+12
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