13+7x=9x-9

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Solution for 13+7x=9x-9 equation: 



13+7x=9x-9

We move all terms to the left:

13+7x-(9x-9)=0

We get rid of parentheses

7x-9x+9+13=0

We add all the numbers together, and all the variables

-2x+22=0

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

-2x=-22

x=-22/-2

x=+11

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