7y+12=4y-15

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Solution for 7y+12=4y-15 equation: 



7y+12=4y-15

We move all terms to the left:

7y+12-(4y-15)=0

We get rid of parentheses

7y-4y+15+12=0

We add all the numbers together, and all the variables

3y+27=0

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

3y=-27

y=-27/3

y=-9

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