Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 1 - Solving Linear Equations - 1.4 - Solving Absolute Value Equations - Exercises - Page 32: 22

Answer

$-3;6$

Work Step by Step

Given $$-3\left|1 - \frac{2}{3}v\right| = -9.$$ Divide both sides by $-3$ $$\left|1 - \frac{2}{3}v\right| = 3.$$ a) Equate to $3$ $$1 - \frac{2}{3}v = 3.$$ Subtract $1$ from both sides $$- \frac{2}{3}v = 2.$$ Multiply both sides by $3$ $$-2v = 6.$$ Divide both sides by $-2$ $$v = -3.$$ b) Equate to $-3$ $$1 - \frac{2}{3}v = -3.$$ Subtract $1$ from both sides $$- \frac{2}{3}v = -4.$$ Multiply both sides by $3$ $$-2v = -12.$$ Divide both sides by $-2$ $$v = 6.$$ Hence the solutions are $-3$ and $6$.
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