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x*18/100=3886
We move all terms to the left:
x*18/100-(3886)=0
We multiply all the terms by the denominator
x*18-3886*100=0
We add all the numbers together, and all the variables
x*18-388600=0
Wy multiply elements
18x-388600=0
We move all terms containing x to the left, all other terms to the right
18x=388600
x=388600/18
x=21588+8/9
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