9x+13=12x-8

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Solution for 9x+13=12x-8 equation: 



9x+13=12x-8

We move all terms to the left:

9x+13-(12x-8)=0

We get rid of parentheses

9x-12x+8+13=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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