90=(2x+1)+(x+2)

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Solution for 90=(2x+1)+(x+2) equation: 



90=(2x+1)+(x+2)

We move all terms to the left:

90-((2x+1)+(x+2))=0



We calculate terms in parentheses: -((2x+1)+(x+2)), so:

(2x+1)+(x+2)

We get rid of parentheses

2x+x+1+2

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+87=0

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

-3x=-87

x=-87/-3

x=+29

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