Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.2 Linear Equations in One Variable and Proportions - Exercise Set 6.2: 7

Answer

{9}

Work Step by Step

5x = 45 Step 1: Divide both the sides by 5 $\frac{5x}{5}$ = $\frac{45}{5}$ Step 2: Simplify x= 9 Now we check the proposed solution, 9, by replacing x with 9 in the original equation. Step 1: the original equation 5x = 45 Step2: Substitute 9 for x 5.9 = 45 Step 3: Solve 5.9=45 45 = 45 Since the check results in true statement, we conclude that the solution set of the given equation is {9}.
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