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500x-30x=130+20x
We move all terms to the left:
500x-30x-(130+20x)=0
We add all the numbers together, and all the variables
500x-30x-(20x+130)=0
We add all the numbers together, and all the variables
470x-(20x+130)=0
We get rid of parentheses
470x-20x-130=0
We add all the numbers together, and all the variables
450x-130=0
We move all terms containing x to the left, all other terms to the right
450x=130
x=130/450
x=13/45
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