Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-9 Percents - Practice and Problem-Solving Exercises - Page 143: 52


The original price of the dress was $120$ dollars

Work Step by Step

$y=x-0.15x$->$y=0.85x$ x is the original price y is the sales price The sales price is equal to the original price minus 15% of the original price $91.80=y-0.1y$->$91.8=0.9y$ 91.80 = sales price - 10% $91.80-0.9(0.85x)$ $91.8=0.765x$ $\frac{91.8}{0.765}=\frac{0.765}{0.765}x$ $120=x$
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