3y-21=2y+12

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Solution for 3y-21=2y+12 equation: 



3y-21=2y+12

We move all terms to the left:

3y-21-(2y+12)=0

We get rid of parentheses

3y-2y-12-21=0

We add all the numbers together, and all the variables

y-33=0

We move all terms containing y to the left, all other terms to the right

y=33

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