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X-2800=0.3X
We move all terms to the left:
X-2800-(0.3X)=0
We add all the numbers together, and all the variables
X-(+0.3X)-2800=0
We get rid of parentheses
X-0.3X-2800=0
We add all the numbers together, and all the variables
0.7X-2800=0
We move all terms containing X to the left, all other terms to the right
0.7X=2800
X=2800/0.7
X=4000
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