7x=7(2x-9)=126

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Solution for 7x=7(2x-9)=126 equation: 



7x=7(2x-9)=126

We move all terms to the left:

7x-(7(2x-9))=0



We calculate terms in parentheses: -(7(2x-9)), so:

7(2x-9)

We multiply parentheses

14x-63

Back to the equation:

-(14x-63)



We get rid of parentheses

7x-14x+63=0

We add all the numbers together, and all the variables

-7x+63=0

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

-7x=-63

x=-63/-7

x=+9

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