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1000-2.5x=x
We move all terms to the left:
1000-2.5x-(x)=0
We add all the numbers together, and all the variables
-3.5x+1000=0
We move all terms containing x to the left, all other terms to the right
-3.5x=-1000
x=-1000/-3.5
x=285+2.5/3.5
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