Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 2 - Real Numbers - 2.3 - Real Numbers and Algebraic Expressions - Problem Set 2.3 - Page 68: 64



Work Step by Step

1. Expand the algebraic expression: $0.7(x+7)-0.9(x-2)+0.5x$ =$0.7x+4.9-0.9x+1.8+0.5x$ 2. Rewrite the expression: $0.7x+4.9-0.9x+1.8+0.5x$ $=0.7x-0.9x+0.5x+4.9+1.8$ 3. Use the distributive property to simplify the algebraic expression and then add/subtract: $=0.7x-0.9x+0.5x+4.9+1.8$ $=x(0.7-0.9+0.5)+4.9+1.8$ $=x(0.3)+6.7$ $=0.3x+6.7$
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