Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.1 - Introduction to Algebra: Variables and Mathematical Models - Exercise Set - Page 11: 46

Answer

solution

Work Step by Step

50 - y = 20;30 To check whether 30 is the solution of the given expression, Substitute 30 for y 50 - 30 =20 (subtract 50 -30) 20 = 20 The statement is true because the values on both sides of the equation are the same, the number 30 is a solution of the equation.
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