9=y+(-4)

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



9=y+(-4)

We move all terms to the left:

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



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

y+(-4)

We add all the numbers together, and all the variables

y-4

Back to the equation:

-(y-4)



We get rid of parentheses

-y+4+9=0

We add all the numbers together, and all the variables

-1y+13=0

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

-y=-13

y=-13/-1

y=+13

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