13x=12+9x

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Solution for 13x=12+9x equation: 



13x=12+9x

We move all terms to the left:

13x-(12+9x)=0

We add all the numbers together, and all the variables

13x-(9x+12)=0

We get rid of parentheses

13x-9x-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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