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x+0.20x=100000
We move all terms to the left:
x+0.20x-(100000)=0
We add all the numbers together, and all the variables
1.2x-100000=0
We move all terms containing x to the left, all other terms to the right
1.2x=100000
x=100000/1.2
x=83333+0.40000000000873/1.2
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