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x-0.1x=3540
We move all terms to the left:
x-0.1x-(3540)=0
We add all the numbers together, and all the variables
0.9x-3540=0
We move all terms containing x to the left, all other terms to the right
0.9x=3540
x=3540/0.9
x=3933+0.29999999999973/0.9
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