3(y+7)=84

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Solution for 3(y+7)=84 equation: 



3(y+7)=84

We move all terms to the left:

3(y+7)-(84)=0

We multiply parentheses

3y+21-84=0

We add all the numbers together, and all the variables

3y-63=0

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

3y=63

y=63/3

y=21

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