Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 7 - Algebraic Fractions - 7.4 - Addition and Subtraction of Algebraic Fractions and Simplifying Complex Fractions - Problem Set 7.4 - Page 300: 62



Work Step by Step

The fraction can be given by: $\frac{\text{amount of the whole}}{whole}$. Since m is the time it takes to do the whole lawn, it goes in the denominator. Since 20 is the amount of the whole completed, it goes in the numerator.
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