Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.8 Solving Equations - A.8 Assess Your Understanding - Page A70: 13

Answer

$x=-1$

Work Step by Step

Combining the like terms and simplifying, we have $$ 6 - x = 2x + 9 \Longrightarrow -3 x = -6+ 9 \Longrightarrow -3x=3 $$ Dividing both sides by $-3$ gives $$ x=-1 $$
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