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31x+39=16x-10
We move all terms to the left:
31x+39-(16x-10)=0
We get rid of parentheses
31x-16x+10+39=0
We add all the numbers together, and all the variables
15x+49=0
We move all terms containing x to the left, all other terms to the right
15x=-49
x=-49/15
x=-3+4/15
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