3y=(84-y)

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Solution for 3y=(84-y) equation: 



3y=(84-y)

We move all terms to the left:

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

We add all the numbers together, and all the variables

3y-((-1y+84))=0



We calculate terms in parentheses: -((-1y+84)), so:

(-1y+84)

We get rid of parentheses

-1y+84

Back to the equation:

-(-1y+84)



We get rid of parentheses

3y+1y-84=0

We add all the numbers together, and all the variables

4y-84=0

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

4y=84

y=84/4

y=21

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