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6(y+2)-12=21
We move all terms to the left:
6(y+2)-12-(21)=0
We add all the numbers together, and all the variables
6(y+2)-33=0
We multiply parentheses
6y+12-33=0
We add all the numbers together, and all the variables
6y-21=0
We move all terms containing y to the left, all other terms to the right
6y=21
y=21/6
y=3+1/2
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