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140x+50=20x+150
We move all terms to the left:
140x+50-(20x+150)=0
We get rid of parentheses
140x-20x-150+50=0
We add all the numbers together, and all the variables
120x-100=0
We move all terms containing x to the left, all other terms to the right
120x=100
x=100/120
x=5/6
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