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18=42+5y
We move all terms to the left:
18-(42+5y)=0
We add all the numbers together, and all the variables
-(5y+42)+18=0
We get rid of parentheses
-5y-42+18=0
We add all the numbers together, and all the variables
-5y-24=0
We move all terms containing y to the left, all other terms to the right
-5y=24
y=24/-5
y=-4+4/5
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