Thinking Mathematically (6th Edition)

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

Chapter 6 - Algebra: Equations and Inequalities - 6.1 Algebraic Expressions and Formulas - Exercise Set 6.1: 56

Answer

14y - 15

Work Step by Step

4(5y - 3) - (6y + 3) Use the distributive property to remove the parentheses =4.5y - 4.3 - (6y+3) Drop parentheses and change the sign of each term in parentheses: -(6y+3) = -6y -3 = 4.5y -4.3 - 6y-3 Multiply = 20y - 12 -6y -3 Group like terms = (20y - 6y) - (12+3) combine like terms (20y - 6y) = (20-6)y = 14y, (12+3) =15 14y - 15
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