12y-8=3y-21

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Solution for 12y-8=3y-21 equation: 



12y-8=3y-21

We move all terms to the left:

12y-8-(3y-21)=0

We get rid of parentheses

12y-3y+21-8=0

We add all the numbers together, and all the variables

9y+13=0

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

9y=-13

y=-13/9

y=-1+4/9

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