-7(y+8)=21

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Solution for -7(y+8)=21 equation: 



-7(y+8)=21

We move all terms to the left:

-7(y+8)-(21)=0

We multiply parentheses

-7y-56-21=0

We add all the numbers together, and all the variables

-7y-77=0

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

-7y=77

y=77/-7

y=-11

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