Answer
See below.
Work Step by Step
The denominators cannot be added. We must bring the terms to the lowest common denominator and then add them.
Thus $\frac{1}{x}+\frac{3}{7}=\frac{7}{7x}+\frac{3x}{7x}=\frac{7+3x}{7x}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 6 - Section 6.2 - Adding and Subtracting Rational Expressions - Exercise Set - Page 429: 92
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