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50x-3=120-3x
We move all terms to the left:
50x-3-(120-3x)=0
We add all the numbers together, and all the variables
50x-(-3x+120)-3=0
We get rid of parentheses
50x+3x-120-3=0
We add all the numbers together, and all the variables
53x-123=0
We move all terms containing x to the left, all other terms to the right
53x=123
x=123/53
x=2+17/53
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