Answer
You shrink your lifespan by $5$ years.
Work Step by Step
Having a blood relative 95 or older adds $10$ years and smoking
cigarettes takes away $15$ years. Add to find the solution
$10+(-15)=10-15=-5$
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: 97
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