(Y=3)(y+7)

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



(=3)(Y+7)

We move all terms to the left:

(-(3)(Y+7))=0



We calculate terms in parentheses: +(-3(Y+7)), so:

-3(Y+7)

We multiply parentheses

-3Y-21

Back to the equation:

+(-3Y-21)



We get rid of 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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