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2x+31=2x-312x+31
We move all terms to the left:
2x+31-(2x-312x+31)=0
We add all the numbers together, and all the variables
2x-(-310x+31)+31=0
We get rid of parentheses
2x+310x-31+31=0
We add all the numbers together, and all the variables
312x=0
x=0/312
x=0
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