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x+x*18/100=3540
We move all terms to the left:
x+x*18/100-(3540)=0
We multiply all the terms by the denominator
x*100+x*18-3540*100=0
We add all the numbers together, and all the variables
x*100+x*18-354000=0
Wy multiply elements
100x+18x-354000=0
We add all the numbers together, and all the variables
118x-354000=0
We move all terms containing x to the left, all other terms to the right
118x=354000
x=354000/118
x=3000
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