Add or subtract as indicated. Simplify the result, if possible.
-$$\frac { 5 } { x - 7 } + \frac { 4 } { 7 - x }$$
A) $- \frac { 1 } { x - 7 }$
B) $\frac { 1 } { x - 7 }$
C) $\frac { 9 } { x - 7 }$
D) $- \frac { 1 } { 7 - x }$

Question

Quizplus · Accepted Answer

The denominators are opposites, so the numerators can be added directly. The result is $\frac { 5 + 4 } { x - 7 } = \frac { 9 } { x - 7 }$.

Add or Subtract as Indicated 5x−7+47−x\frac { 5 } { x - 7 } + \frac { 4 } { 7 - x }x−75​+7−x4​

Add or Subtract as Indicated $\frac { 5 } { x - 7 } + \frac { 4 } { 7 - x }$