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: 22

Answer

x = 6

Work Step by Step

2[3x - (4x - 6)] = 5(x - 6) Expand the left side of the equation: 2[3x - (4x - 6)] = 2(3x - 4x + 6) = 2(-x+6) = -2x +12 Expand the right side of the equation: 5(x - 6) = 5x - 30 Rewrite the equation: -2x + 12 = 5x - 30 Subtract 12 from both sides: -2x + 12 - 12 = 5x - 30 - 12 -2x = 5x - 42 Simplify -7x = - 42 Divide both sides by -7: x = 6 Check: 2[3x - (4x - 6)] = 5(x - 6) 2[3(6) - (4(6) - 6)] = 5((6) - 6) 2[18-18] = 0 0 = 0 --> TRUE
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