3(y+2)-12=-21

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



3(y+2)-12=-21

We move all terms to the left:

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

We add all the numbers together, and all the variables

3(y+2)+9=0

We multiply parentheses

3y+6+9=0

We add all the numbers together, and all the variables

3y+15=0

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

3y=-15

y=-15/3

y=-5

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