-9=13x-7x+12

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Solution for -9=13x-7x+12 equation: 



-9=13x-7x+12

We move all terms to the left:

-9-(13x-7x+12)=0

We add all the numbers together, and all the variables

-(6x+12)-9=0

We get rid of parentheses

-6x-12-9=0

We add all the numbers together, and all the variables

-6x-21=0

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

-6x=21

x=21/-6

x=-3+1/2

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