4y+12=3y-9

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Solution for 4y+12=3y-9 equation: 



4y+12=3y-9

We move all terms to the left:

4y+12-(3y-9)=0

We get rid of parentheses

4y-3y+9+12=0

We add all the numbers together, and all the variables

y+21=0

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

y=-21

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