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220=12(12+y)
We move all terms to the left:
220-(12(12+y))=0
We add all the numbers together, and all the variables
-(12(y+12))+220=0
We calculate terms in parentheses: -(12(y+12)), so:We get rid of parentheses
12(y+12)
We multiply parentheses
12y+144
Back to the equation:
-(12y+144)
-12y-144+220=0
We add all the numbers together, and all the variables
-12y+76=0
We move all terms containing y to the left, all other terms to the right
-12y=-76
y=-76/-12
y=6+1/3
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