91=(x-9)+x+2x

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Solution for 91=(x-9)+x+2x equation: 



91=(x-9)+x+2x

We move all terms to the left:

91-((x-9)+x+2x)=0



We calculate terms in parentheses: -((x-9)+x+2x), so:

(x-9)+x+2x

We add all the numbers together, and all the variables

3x+(x-9)

We get rid of parentheses

3x+x-9

We add all the numbers together, and all the variables

4x-9

Back to the equation:

-(4x-9)



We get rid of parentheses

-4x+9+91=0

We add all the numbers together, and all the variables

-4x+100=0

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

-4x=-100

x=-100/-4

x=+25

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