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X=-2X+1000
We move all terms to the left:
X-(-2X+1000)=0
We get rid of parentheses
X+2X-1000=0
We add all the numbers together, and all the variables
3X-1000=0
We move all terms containing X to the left, all other terms to the right
3X=1000
X=1000/3
X=333+1/3
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