90=(2x-23)+(x+20)

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Solution for 90=(2x-23)+(x+20) equation: 



90=(2x-23)+(x+20)

We move all terms to the left:

90-((2x-23)+(x+20))=0



We calculate terms in parentheses: -((2x-23)+(x+20)), so:

(2x-23)+(x+20)

We get rid of parentheses

2x+x-23+20

We add all the numbers together, and all the variables

3x-3

Back to the equation:

-(3x-3)



We get rid of parentheses

-3x+3+90=0

We add all the numbers together, and all the variables

-3x+93=0

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

-3x=-93

x=-93/-3

x=+31

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