Algebra 1: Common Core (15th Edition)

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

Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises - Page 92: 48

Answer

$k=4$

Work Step by Step

We need to get the k alone. Thus, we cancel out the addition by subtracting 4 on both sides. This leaves us with the equation $-5k=-20$. In order to cancel out multiplication, we use division, so we divide both sides by -5 to get that $k=4$. We plug 4 in for k and confirm that our answer is, indeed, correct.
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