x=9(12+x)=90

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Solution for x=9(12+x)=90 equation: 



x=9(12+x)=90

We move all terms to the left:

x-(9(12+x))=0

We add all the numbers together, and all the variables

x-(9(x+12))=0



We calculate terms in parentheses: -(9(x+12)), so:

9(x+12)

We multiply parentheses

9x+108

Back to the equation:

-(9x+108)



We get rid of parentheses

x-9x-108=0

We add all the numbers together, and all the variables

-8x-108=0

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

-8x=108

x=108/-8

x=-13+1/2

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