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900x-200=600x+500
We move all terms to the left:
900x-200-(600x+500)=0
We get rid of parentheses
900x-600x-500-200=0
We add all the numbers together, and all the variables
300x-700=0
We move all terms containing x to the left, all other terms to the right
300x=700
x=700/300
x=2+1/3
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