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X-0.15X=80
We move all terms to the left:
X-0.15X-(80)=0
We add all the numbers together, and all the variables
0.85X-80=0
We move all terms containing X to the left, all other terms to the right
0.85X=80
X=80/0.85
X=94+0.10000000000001/0.85
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