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x-(0.1x)=3000
We move all terms to the left:
x-(0.1x)-(3000)=0
We add all the numbers together, and all the variables
x-(+0.1x)-3000=0
We get rid of parentheses
x-0.1x-3000=0
We add all the numbers together, and all the variables
0.9x-3000=0
We move all terms containing x to the left, all other terms to the right
0.9x=3000
x=3000/0.9
x=3333+0.29999999999973/0.9
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