90=(x-15)+(4x+5)

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Solution for 90=(x-15)+(4x+5) equation: 



90=(x-15)+(4x+5)

We move all terms to the left:

90-((x-15)+(4x+5))=0



We calculate terms in parentheses: -((x-15)+(4x+5)), so:

(x-15)+(4x+5)

We get rid of parentheses

x+4x-15+5

We add all the numbers together, and all the variables

5x-10

Back to the equation:

-(5x-10)



We get rid of parentheses

-5x+10+90=0

We add all the numbers together, and all the variables

-5x+100=0

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

-5x=-100

x=-100/-5

x=+20

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