Answer
6
Work Step by Step
Using the rules of Algebra to solve, we obtain:
$$\left(\sqrt{8x+1}\right)^2=7^2 \\ 8x+1=49 \\ x=6$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 6 Rational Exponents and Radical Functions - Cumulative Review Chapters 1-6 - Page 474: 12
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