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: 53

Answer

solution

Work Step by Step

5a-4 = 2a+5;3 To check whether 3 is the solution of the given expression, substitute 3 for a. 5*3 - 4 = 2*3 + 5 (multiply 5*3 and 2*3) 15 -4 =6 +5(add 6+5) 15 -4 = 11(subtract 15 -4) 11 = 11 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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