90=(5x+12)-(4x-3)

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Solution for 90=(5x+12)-(4x-3) equation: 



90=(5x+12)-(4x-3)

We move all terms to the left:

90-((5x+12)-(4x-3))=0



We calculate terms in parentheses: -((5x+12)-(4x-3)), so:

(5x+12)-(4x-3)

We get rid of parentheses

5x-4x+12+3

We add all the numbers together, and all the variables

x+15

Back to the equation:

-(x+15)



We get rid of parentheses

-x-15+90=0

We add all the numbers together, and all the variables

-1x+75=0

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

-x=-75

x=-75/-1

x=+75

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