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12=1+3y
We move all terms to the left:
12-(1+3y)=0
We add all the numbers together, and all the variables
-(3y+1)+12=0
We get rid of parentheses
-3y-1+12=0
We add all the numbers together, and all the variables
-3y+11=0
We move all terms containing y to the left, all other terms to the right
-3y=-11
y=-11/-3
y=3+2/3
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