Answer
The person's lifespan does not change.
Work Step by Step
Regularly working puzzles adds 5 years and frequently
feeling stressed takes away 5 years. Add to find the solution
$5+(-5)=5-5=0$
The person's lifespan does not change.
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Section 1.6 - Subtraction of Real Numbers - Exercise Set - Page 72: 102
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