Algebra 1: Common Core (15th Edition)

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

Chapter 2 - Solving Equations - Mid-Chapter Quiz - Page 115: 22


Dividing by decimals is harder and is more likely to cause an error.

Work Step by Step

If we multiply everything by $1000$, the numbers will be integers and the answer will still come out to be the same. If we keep the numbers in decimal form, there is more room for error which may cause problems in other parts of the equation. Thus, your classmate's method is correct but is more difficult than other methods.
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