12+7x+3x-1=71

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Solution for 12+7x+3x-1=71 equation: 



12+7x+3x-1=71

We move all terms to the left:

12+7x+3x-1-(71)=0

We add all the numbers together, and all the variables

10x-60=0

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

10x=60

x=60/10

x=6

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