12x-13x=72

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Solution for 12x-13x=72 equation: 



12x-13x=72

We move all terms to the left:

12x-13x-(72)=0

We add all the numbers together, and all the variables

-1x-72=0

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

-x=72

x=72/-1

x=-72

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