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x-(.1x)=287000
We move all terms to the left:
x-(.1x)-(287000)=0
We add all the numbers together, and all the variables
x-(+.1x)-287000=0
We get rid of parentheses
x-.1x-287000=0
We add all the numbers together, and all the variables
0.9x-287000=0
We move all terms containing x to the left, all other terms to the right
0.9x=287000
x=287000/0.9
x=318888+0.79999999998836/0.9
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