90=-(3x+20)+(-2x+55)

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Solution for 90=-(3x+20)+(-2x+55) equation: 



90=-(3x+20)+(-2x+55)

We move all terms to the left:

90-(-(3x+20)+(-2x+55))=0



We calculate terms in parentheses: -(-(3x+20)+(-2x+55)), so:

-(3x+20)+(-2x+55)

We get rid of parentheses

-3x-2x-20+55

We add all the numbers together, and all the variables

-5x+35

Back to the equation:

-(-5x+35)



We get rid of parentheses

5x-35+90=0

We add all the numbers together, and all the variables

5x+55=0

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

5x=-55

x=-55/5

x=-11

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