90=2x+15+(3x-15)

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Solution for 90=2x+15+(3x-15) equation: 



90=2x+15+(3x-15)

We move all terms to the left:

90-(2x+15+(3x-15))=0



We calculate terms in parentheses: -(2x+15+(3x-15)), so:

2x+15+(3x-15)

determiningTheFunctionDomain
2x+(3x-15)+15

We get rid of parentheses

2x+3x-15+15

We add all the numbers together, and all the variables

5x

Back to the equation:

-(5x)



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

-5x=-90

x=-90/-5

x=+18

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