3(7=y)

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Solution for 3(7=y) equation: 



3(7=y)

We move all terms to the left:

3(7-(y))=0

We add all the numbers together, and all the variables

3(-1y+7)=0

We multiply parentheses

-3y+21=0

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

-3y=-21

y=-21/-3

y=+7

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