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2x+5x+x-3+3x-1=39
We move all terms to the left:
2x+5x+x-3+3x-1-(39)=0
We add all the numbers together, and all the variables
11x-43=0
We move all terms containing x to the left, all other terms to the right
11x=43
x=43/11
x=3+10/11
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