Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - Chapters 1-9 Cumulative Review Problem Set: 80

Answer

{$27$}

Work Step by Step

Rearranging the equation to separate the radical and then squaring both sides of the equation, we obtain: $\sqrt {3n}-2=7$ $\sqrt {3n}=7+2$ $\sqrt {3n}=9$ $(\sqrt {3n})^{2}=9^{2}$ $3n=81$ $x=\frac{81}{3}=27$ Therefore, the solution set is {$27$}.
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