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: 54

Answer

solution

Work Step by Step

5a-3 = 2a+6;3 To check whether 3 is the solution of the given expression, substitute 3 for a. 5*3 - 3 = 2*3 + 6 (multiply 5*3 and 2*3) 15 -3 =6 +6(add 6+6) 15 -3 = 12(subtract 15 -3) 12 = 12 The statement is true, because the values on both sides of the equation are same. Therefore, the number 3 is the solution of the equation.
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