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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -((8y-7)-(3y+9)), so:

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

We get rid of parentheses

8y-3y-7-9

We add all the numbers together, and all the variables

5y-16

Back to the equation:

-(5y-16)



We get rid of parentheses

-5y+16+4=0

We add all the numbers together, and all the variables

-5y+20=0

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

-5y=-20

y=-20/-5

y=+4

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