13x+5x-9x=12

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Solution for 13x+5x-9x=12 equation: 



13x+5x-9x=12

We move all terms to the left:

13x+5x-9x-(12)=0

We add all the numbers together, and all the variables

9x-12=0

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

9x=12

x=12/9

x=1+1/3

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