Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 2 - Solving Equations - 2-7 Solving Proportions - Practice and Problem-Solving Exercises - Page 127: 30

Answer

$k=13\frac{1}{5}$

Work Step by Step

$\frac{7}{k-2}=\frac{5}{8}$ cross multiply $7\times8=5(k-2)$ distributive property $56=5k-10$ add 10 to both sides $56+10=5k-10+10$ simplify $66=5k$ divide both sides by 5 $66\div5=5k\div5$ simplify $13\frac{1}{5}=k$
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