Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Appendix A - Basic Algebra Review - A Exercises: 79

Answer

$k=53$

Work Step by Step

Step 1: $\frac{k-5}{4}+9=21$ Step 2: Subtract 9 from both sides: $\frac{k-5}{4}+9-9=21-9$. Step 3: $\frac{k-5}{4}=12$ Step 4: Multiply both sides by 4: $\frac{k-5}{4}\times4=12\times4$. Step 5: $k-5=48$ Step 6: Add 5 to both sides: $k-5+5=48+5$. Step 7: $k=53$
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