Question

1/3(x+3) - 2/x+3, where x is not equal to negative 3

Answer 1

If $x\neq 3$, then

$\frac{1}{3(x+3)} - \frac{2}{x+3} = \frac{1\cdot 1-2\cdot 3}{3(x+3)} = \frac{-5}{3(x+3)} =- \frac{5}{3(x+3)}$.