-9=7(y+3)-4y

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Solution for -9=7(y+3)-4y equation: 



-9=7(y+3)-4y

We move all terms to the left:

-9-(7(y+3)-4y)=0



We calculate terms in parentheses: -(7(y+3)-4y), so:

7(y+3)-4y

We add all the numbers together, and all the variables

-4y+7(y+3)

We multiply parentheses

-4y+7y+21

We add all the numbers together, and all the variables

3y+21

Back to the equation:

-(3y+21)



We get rid of parentheses

-3y-21-9=0

We add all the numbers together, and all the variables

-3y-30=0

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

-3y=30

y=30/-3

y=-10

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