Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 8 - Rational Functions - 8-6 Solving Rational Equations - Lesson Check - Page 545: 1

Answer

$x = 5$

Work Step by Step

Multiply each side of the equation by the least common denominator, or LCD, which is $x - 2$, in this case: $\dfrac{4}{x - 2} \cdot (x - 2) = \dfrac{x - 1}{x - 2} \cdot(x- 2)$ Cancel out common terms in the numerators and denominators: $4 = x - 1$ Add $1$ to each side of the equation: $x = 5$ To check the solution, plug in $5$ for $x$ into the original equation: $\dfrac{4}{5 - 2} = \dfrac{5 - 1}{5 - 2}$ Simplify the fractions: $\dfrac{4}{3} = \dfrac{4}{3}$ Both sides are equal to one another; therefore, this solution is correct.
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