Trigonometry (10th Edition)

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

Appendix A - Equations and Inequalities - Exercises - Page 416: 26

Answer

Conditional equation. The solution set is {$0$}.

Work Step by Step

Step 1: $-8(x+5)=-8x-5(x+8)$ Step 2: $-8x-40=-8x-5x-40$ Step 3: Adding $8x$ to both sides, $-8x+8x-40=-8x+8x-5x-40$ Step 4: $-40=-5x-40$ Step 5: Adding $40$ to both sides, $-40+40=-5x-40+40$ Step 6: $0=-5x$ Step 7: Dividing both sides by $-5$, $\frac{0}{-5}=\frac{-5x}{-5}$ Step 8: Therefore, $x=0$ As the equation is satisfied by x=0, it is a conditional equation. The solution set is {$0$}.
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