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5x-30=3x+50
We move all terms to the left:
5x-30-(3x+50)=0
We get rid of parentheses
5x-3x-50-30=0
We add all the numbers together, and all the variables
2x-80=0
We move all terms containing x to the left, all other terms to the right
2x=80
x=80/2
x=40
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