90=x+(2x+15)

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Solution for 90=x+(2x+15) equation: 



90=x+(2x+15)

We move all terms to the left:

90-(x+(2x+15))=0



We calculate terms in parentheses: -(x+(2x+15)), so:

x+(2x+15)

We get rid of parentheses

x+2x+15

We add all the numbers together, and all the variables

3x+15

Back to the equation:

-(3x+15)



We get rid of parentheses

-3x-15+90=0

We add all the numbers together, and all the variables

-3x+75=0

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

-3x=-75

x=-75/-3

x=+25

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