Answer
a=12
Work Step by Step
By developing the brackets we have:
$a +a + 2 = 26$
$2a + 2 = 26$
We subtract 2 from both sides:
$2a = 26-2 =24$
We divide both sides by 2:
$a = 24\div 2 = 12$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Appendix A - A.2 - Formulas and Equations - Exercises - Page 546: 25
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