6y+21=-9(y-4)

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Solution for 6y+21=-9(y-4) equation: 



6y+21=-9(y-4)

We move all terms to the left:

6y+21-(-9(y-4))=0



We calculate terms in parentheses: -(-9(y-4)), so:

-9(y-4)

We multiply parentheses

-9y+36

Back to the equation:

-(-9y+36)



We get rid of parentheses

6y+9y-36+21=0

We add all the numbers together, and all the variables

15y-15=0

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

15y=15

y=15/15

y=1

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