Question 1202285
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The dress was marked down 20% of its original price for the sale, 
and it still sold for $120. What would it sell for if the markdown 
of the original price was only 10%?
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Let x be the original price (before the 20% markwown).

The problem says

    (1-0.2)x = 120  dollars,

or  0.8x = 120;  x = 120/0.8 = 150 dollars.


Thus the original price of the dress was $150.


Hence, at 10% markdown, the celling price would be 150 - 0.1*150 = 150 - 15 = 135 dollars.    <U>ANSWER</U>
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Solved.