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18=5y+12
We move all terms to the left:
18-(5y+12)=0
We get rid of parentheses
-5y-12+18=0
We add all the numbers together, and all the variables
-5y+6=0
We move all terms containing y to the left, all other terms to the right
-5y=-6
y=-6/-5
y=1+1/5
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