Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - Summary Exercises on Solving Equations - Exercises: 14

Answer

$x=-2.4$

Work Step by Step

Subtract $0.7x$ and $0.3$ to both sides of the equation to obtain: $$1.2x+0.3-0.7x-0.3=0.7x-0.9-0.7x-0.3 \\0.5x=-1.2$$ Divide $0.5$ to both sides of the equation to obtain: $$\dfrac{0.5x}{0.5}=\dfrac{-1.2}{0.5} \\x = -2.4$$
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