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50x-50=20x+20
We move all terms to the left:
50x-50-(20x+20)=0
We get rid of parentheses
50x-20x-20-50=0
We add all the numbers together, and all the variables
30x-70=0
We move all terms containing x to the left, all other terms to the right
30x=70
x=70/30
x=2+1/3
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