13x-31=86

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Solution for 13x-31=86 equation: 



13x-31=86

We move all terms to the left:

13x-31-(86)=0

We add all the numbers together, and all the variables

13x-117=0

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

13x=117

x=117/13

x=9

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