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6x-31=8x-17
We move all terms to the left:
6x-31-(8x-17)=0
We get rid of parentheses
6x-8x+17-31=0
We add all the numbers together, and all the variables
-2x-14=0
We move all terms containing x to the left, all other terms to the right
-2x=14
x=14/-2
x=-7
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