90=9(-3+x)

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Solution for 90=9(-3+x) equation: 



90=9(-3+x)

We move all terms to the left:

90-(9(-3+x))=0

We add all the numbers together, and all the variables

-(9(x-3))+90=0



We calculate terms in parentheses: -(9(x-3)), so:

9(x-3)

We multiply parentheses

9x-27

Back to the equation:

-(9x-27)



We get rid of parentheses

-9x+27+90=0

We add all the numbers together, and all the variables

-9x+117=0

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

-9x=-117

x=-117/-9

x=+13

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