a man sells an article at a gain of 50%. if he had sold it at 63 rupees less, he would have lost 20%.find the cost of the article.
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50%-(-20%) of x=63
(50+20)% of x=63
70% of x=63
70/100*x=63
7x/10=63
7x=630
x=90
(50+20)% of x=63
70% of x=63
70/100*x=63
7x/10=63
7x=630
x=90
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