90=(7x-10)+(2x+1)

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Solution for 90=(7x-10)+(2x+1) equation: 



90=(7x-10)+(2x+1)

We move all terms to the left:

90-((7x-10)+(2x+1))=0



We calculate terms in parentheses: -((7x-10)+(2x+1)), so:

(7x-10)+(2x+1)

We get rid of parentheses

7x+2x-10+1

We add all the numbers together, and all the variables

9x-9

Back to the equation:

-(9x-9)



We get rid of parentheses

-9x+9+90=0

We add all the numbers together, and all the variables

-9x+99=0

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

-9x=-99

x=-99/-9

x=+11

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