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50=130+680x
We move all terms to the left:
50-(130+680x)=0
We add all the numbers together, and all the variables
-(680x+130)+50=0
We get rid of parentheses
-680x-130+50=0
We add all the numbers together, and all the variables
-680x-80=0
We move all terms containing x to the left, all other terms to the right
-680x=80
x=80/-680
x=-2/17
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