-4y-3(7y-7)=-9+8(8-y)

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Solution for -4y-3(7y-7)=-9+8(8-y) equation: 



-4y-3(7y-7)=-9+8(8-y)

We move all terms to the left:

-4y-3(7y-7)-(-9+8(8-y))=0

We add all the numbers together, and all the variables

-4y-3(7y-7)-(-9+8(-1y+8))=0

We multiply parentheses

-4y-21y-(-9+8(-1y+8))+21=0



We calculate terms in parentheses: -(-9+8(-1y+8)), so:

-9+8(-1y+8)

determiningTheFunctionDomain
8(-1y+8)-9

We multiply parentheses

-8y+64-9

We add all the numbers together, and all the variables

-8y+55

Back to the equation:

-(-8y+55)



We add all the numbers together, and all the variables

-25y-(-8y+55)+21=0

We get rid of parentheses

-25y+8y-55+21=0

We add all the numbers together, and all the variables

-17y-34=0

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

-17y=34

y=34/-17

y=-2

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