90=x+2x+(x+10)

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



90=x+2x+(x+10)

We move all terms to the left:

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



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

x+2x+(x+10)

We add all the numbers together, and all the variables

3x+(x+10)

We get rid of parentheses

3x+x+10

We add all the numbers together, and all the variables

4x+10

Back to the equation:

-(4x+10)



We get rid of parentheses

-4x-10+90=0

We add all the numbers together, and all the variables

-4x+80=0

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

-4x=-80

x=-80/-4

x=+20

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