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

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



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

We move all terms to the left:

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

We get rid of parentheses

x-7x-x-9+9=0

We add all the numbers together, and all the variables

-7x=0

x=0/-7

x=0

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