Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Appendix A - Equations and Inequalities - Exercises - Page 416: 6

Answer

Not correct. When a true statement such as $0 = 0$ results, the equation is an identity. For an identity, the correct solution set is {all real numbers}.

Work Step by Step

Solving $3(2x-8)=6x-24$: Step 1: $6x-24=6x-24$ Step 2: Adding $24$ to both sides, $6x-24+24=6x-24=24$ Step 3: $6x=6x$ Step 4: Subtracting $6x$ from both sides, $6x-6x=6x-6x$ Step 5: $0=0$ Therefore, the student does indeed obtain an accurate result. However, the solution set selected by the student is wrong. This is because when a true statement such as $0 = 0$ results, the equation is an identity. For an identity, the correct solution set is {all real numbers}.
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