Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 1 - Section 1.1 - Linear Equations in One Variable - 1.1 Exercises - Page 52: 74

Answer

x = -18

Work Step by Step

1. Given: 0.05x - 0.1x + 0.6 = 0.04x + 2.22 2. Multiply both sides by 10 to the 2nd power to turn decimals into whole numbers: 100(0.05x - 0.1x + 0.6) = (0.04x + 2.22)100 5x - 10x + 60 = 4x + 222 3. Add and subtract: -9x = 162 4. Divide: x = -18 5. Check: 0.05(-18) - 0.1(-18) + 0.6 = 0.04(-18) + 2.22 1.5 = 1.5, so -18 is a correct solution of the equation.
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