X=(4x-90)

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Solution for X=(4x-90) equation: 



X=(4X-90)

We move all terms to the left:

X-((4X-90))=0



We calculate terms in parentheses: -((4X-90)), so:

(4X-90)

We get rid of parentheses

4X-90

Back to the equation:

-(4X-90)



We get rid of parentheses

X-4X+90=0

We add all the numbers together, and all the variables

-3X+90=0

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

-3X=-90

X=-90/-3

X=+30

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