9x+12x=13

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Solution for 9x+12x=13 equation: 



9x+12x=13

We move all terms to the left:

9x+12x-(13)=0

We add all the numbers together, and all the variables

21x-13=0

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

21x=13

x=13/21

x=13/21

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