x+x-31=111

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Solution for x+x-31=111 equation: 



x+x-31=111

We move all terms to the left:

x+x-31-(111)=0

We add all the numbers together, and all the variables

2x-142=0

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

2x=142

x=142/2

x=71

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