100=y-(-9)

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Solution for 100=y-(-9) equation: 



100=y-(-9)

We move all terms to the left:

100-(y-(-9))=0



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

y-(-9)

We add all the numbers together, and all the variables

y+9

Back to the equation:

-(y+9)



We get rid of parentheses

-y-9+100=0

We add all the numbers together, and all the variables

-1y+91=0

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

-y=-91

y=-91/-1

y=+91

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