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8x+31=3x+70
We move all terms to the left:
8x+31-(3x+70)=0
We get rid of parentheses
8x-3x-70+31=0
We add all the numbers together, and all the variables
5x-39=0
We move all terms containing x to the left, all other terms to the right
5x=39
x=39/5
x=7+4/5
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