90=(2x+30)+x

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Solution for 90=(2x+30)+x equation: 



90=(2x+30)+x

We move all terms to the left:

90-((2x+30)+x)=0



We calculate terms in parentheses: -((2x+30)+x), so:

(2x+30)+x

We add all the numbers together, and all the variables

x+(2x+30)

We get rid of parentheses

x+2x+30

We add all the numbers together, and all the variables

3x+30

Back to the equation:

-(3x+30)



We get rid of parentheses

-3x-30+90=0

We add all the numbers together, and all the variables

-3x+60=0

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

-3x=-60

x=-60/-3

x=+20

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