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23x+31=-3x-7
We move all terms to the left:
23x+31-(-3x-7)=0
We get rid of parentheses
23x+3x+7+31=0
We add all the numbers together, and all the variables
26x+38=0
We move all terms containing x to the left, all other terms to the right
26x=-38
x=-38/26
x=-1+6/13
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