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3000=x+.2(x)
We move all terms to the left:
3000-(x+.2(x))=0
We add all the numbers together, and all the variables
-(+1.2x)+3000=0
We get rid of parentheses
-1.2x+3000=0
We move all terms containing x to the left, all other terms to the right
-1.2x=-3000
x=-3000/-1.2
x=+2500
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