(7x-9)=(4x-90)

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Solution for (7x-9)=(4x-90) equation: 



(7x-9)=(4x-90)

We move all terms to the left:

(7x-9)-((4x-90))=0

We get rid of parentheses

7x-((4x-90))-9=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

7x-4x+90-9=0

We add all the numbers together, and all the variables

3x+81=0

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

3x=-81

x=-81/3

x=-27

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