Thinking Mathematically (6th Edition)

by Blitzer, Robert F.

Published by Pearson

ISBN 10: 0321867327

ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.2 Linear Equations in One Variable and Proportions - Exercise Set 6.2 - Page 362: 71

Answer

$y=10$.

Work Step by Step

After multiplying both sides by $20$: $2(y+10)=5(y-2)\\2y+20=5y-10\\30=3y\\y=10$. Check: $\frac{10+10}{10}=2=\frac{10-2}{4}$, thus it is a good solution.

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