Answer
$$x=4$$
Work Step by Step
Solving the equation using the LCD method, we find:
$$\frac{1}{x+1}\left(x+1\right)+3\left(x+1\right)=\frac{4x}{x+1}\left(x+1\right) \\ 3x=4x-4\\ x=4$$
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 9 Quadratic Relations and Conic Sections - 9.1 Apply the Distance and Midpoint Formulas - 9.1 Exercises - Mixed Review - Page 619: 75
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