90=(55-x)

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Solution for 90=(55-x) equation: 



90=(55-x)

We move all terms to the left:

90-((55-x))=0

We add all the numbers together, and all the variables

-((-1x+55))+90=0



We calculate terms in parentheses: -((-1x+55)), so:

(-1x+55)

We get rid of parentheses

-1x+55

Back to the equation:

-(-1x+55)



We get rid of parentheses

1x-55+90=0

We add all the numbers together, and all the variables

x+35=0

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

x=-35

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