Algebra 1: Common Core (15th Edition)

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

Chapter 6 - Systems of Equations and Inequalities - 6-4 Applications of Linear Systems - Practice and Problem-Solving Exercises - Page 392: 36


$d \leq -2.5$

Work Step by Step

Add $3$ to each side of the equation to move constants to the right side of the equation: $2d \geq 4d + 5$ Subtract $4d$ from each side of the equation: $-2d \geq 5$ Divide each side by $-2$. Remember that when we divide by a negative number, we need to reverse the sign: $d \leq -2.5$
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