3(4y+5)=-21

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Solution for 3(4y+5)=-21 equation: 



3(4y+5)=-21

We move all terms to the left:

3(4y+5)-(-21)=0

We add all the numbers together, and all the variables

3(4y+5)+21=0

We multiply parentheses

12y+15+21=0

We add all the numbers together, and all the variables

12y+36=0

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

12y=-36

y=-36/12

y=-3

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