Perform the indicated operation. Simplify if possible.
-$\frac { 2 } { 7 x } + \frac { 8 } { 9 x }$
A) $\frac { 5 } { 8 x }$
B) $\frac { 74 } { 63 x }$
C) $\frac { 86 } { 63 x }$
D) $\frac { 74 } { 63 x ^ { 2 } }$

Question

Quizplus · Accepted Answer

To add the fractions, find a common denominator, which is $63x$. Rewrite each fraction with this common denominator: $\frac{2}{7x} = \frac{18}{63x}$ and $\frac{8}{9x} = \frac{56}{63x}$. Add the numerators: $18 + 56 = 74$. The result is $\frac{74}{63x}$.

Perform the Indicated Operation 27x+89x\frac { 2 } { 7 x } + \frac { 8 } { 9 x }7x2​+9x8​

Perform the Indicated Operation $\frac { 2 } { 7 x } + \frac { 8 } { 9 x }$