(x-9)=(7x+21)=180

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Solution for (x-9)=(7x+21)=180 equation: 



(x-9)=(7x+21)=180

We move all terms to the left:

(x-9)-((7x+21))=0

We get rid of parentheses

x-((7x+21))-9=0



We calculate terms in parentheses: -((7x+21)), so:

(7x+21)

We get rid of parentheses

7x+21

Back to the equation:

-(7x+21)



We get rid of parentheses

x-7x-21-9=0

We add all the numbers together, and all the variables

-6x-30=0

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

-6x=30

x=30/-6

x=-5

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