Answer
$\frac{-3n}{4}$
Work Step by Step
By inspection, we see that the LCM is $12$. Therefore, we create a common denominator to obtain:
$\frac{7n}{12}-\frac{4n}{3}$
$=\frac{7n-4(4n)}{12}$
$=\frac{7n-16n}{12}$
$=\frac{-9n}{12}$
$=\frac{-3n}{4}$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 7 - Algebraic Fractions - 7.3 - Adding and Subtracting Algebraic Fractions - Problem Set 7.3 - Page 291: 37
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