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500+(-30x)=130+20x
We move all terms to the left:
500+(-30x)-(130+20x)=0
We add all the numbers together, and all the variables
(-30x)-(20x+130)+500=0
We get rid of parentheses
-30x-20x-130+500=0
We add all the numbers together, and all the variables
-50x+370=0
We move all terms containing x to the left, all other terms to the right
-50x=-370
x=-370/-50
x=7+2/5
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