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x-(.3x)=9000
We move all terms to the left:
x-(.3x)-(9000)=0
We add all the numbers together, and all the variables
x-(+.3x)-9000=0
We get rid of parentheses
x-.3x-9000=0
We add all the numbers together, and all the variables
0.7x-9000=0
We move all terms containing x to the left, all other terms to the right
0.7x=9000
x=9000/0.7
x=12857+0.10000000000036/0.7
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