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500-0.5x+300=2x-300
We move all terms to the left:
500-0.5x+300-(2x-300)=0
We add all the numbers together, and all the variables
-0.5x-(2x-300)+800=0
We get rid of parentheses
-0.5x-2x+300+800=0
We add all the numbers together, and all the variables
-2.5x+1100=0
We move all terms containing x to the left, all other terms to the right
-2.5x=-1100
x=-1100/-2.5
x=+440
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