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(9x-31)*2=43
We move all terms to the left:
(9x-31)*2-(43)=0
We multiply parentheses
18x-62-43=0
We add all the numbers together, and all the variables
18x-105=0
We move all terms containing x to the left, all other terms to the right
18x=105
x=105/18
x=5+5/6
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