1. A book was on sale for 40% off its original price. If the sale price of the book was
$18.00, what was the original price of the book? (Assume there is no sales tax.)
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Step-by-step explanation:
sale price of the book = y
given, book was sold at 40% off
40/100* y= 18
y= 18*100/40
y= 36/5=7.2
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