9x=12+13x

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Solution for 9x=12+13x equation: 



9x=12+13x

We move all terms to the left:

9x-(12+13x)=0

We add all the numbers together, and all the variables

9x-(13x+12)=0

We get rid of parentheses

9x-13x-12=0

We add all the numbers together, and all the variables

-4x-12=0

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

-4x=12

x=12/-4

x=-3

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