Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.4 - Solving Linear Equations - Exercise Set - Page 50: 7


The solution set is $\left\{7\right\}$.

Work Step by Step

Solve using the different properties of Algebra to find: $11x-6x-(-5)=40 \\5x+5=40 \\5x=40-5 \\5x=35 \\x=\frac{35}{5} \\x=7$ Check: $11(7)-(6\cdot7-5)\stackrel{?}{=}40 \\77-(42-5)\stackrel{?}{=}40 \\77-37\stackrel{?}{=}40 \\40 \stackrel{\checkmark}{=}40$ The solution set is $\left\{7\right\}$.
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