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x+0.1x=28500
We move all terms to the left:
x+0.1x-(28500)=0
We add all the numbers together, and all the variables
1.1x-28500=0
We move all terms containing x to the left, all other terms to the right
1.1x=28500
x=28500/1.1
x=25909+0.099999999998545/1.1
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