3x-71=-12x+109

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Solution for 3x-71=-12x+109 equation: 



3x-71=-12x+109

We move all terms to the left:

3x-71-(-12x+109)=0

We get rid of parentheses

3x+12x-109-71=0

We add all the numbers together, and all the variables

15x-180=0

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

15x=180

x=180/15

x=12

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