Answer
{2}
Work Step by Step
{x|x+5 =7}
The only solution for this equation is when x=2, so the set is {2}.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 2 - Set Theory - 2.1 Basic Set Concepts - Exercise Set 2.1 - Page 58: 31
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