90=20+(x-8)

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Solution for 90=20+(x-8) equation: 



90=20+(x-8)

We move all terms to the left:

90-(20+(x-8))=0



We calculate terms in parentheses: -(20+(x-8)), so:

20+(x-8)

determiningTheFunctionDomain
(x-8)+20

We get rid of parentheses

x-8+20

We add all the numbers together, and all the variables

x+12

Back to the equation:

-(x+12)



We get rid of parentheses

-x-12+90=0

We add all the numbers together, and all the variables

-1x+78=0

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

-x=-78

x=-78/-1

x=+78

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