Answer
$\dfrac{-7}{9}$
Work Step by Step
RECALL:
$\dfrac{a}{b} \div \dfrac{c}{d} = \dfrac{a}{b} \times \dfrac{d}{c}$
Use the rule above to obtain:
$=\dfrac{-7}{x} \times \dfrac{x}{9}$
Cancel out the common factors, and then multiply to obtain:
$\require{cancel}
\\=\dfrac{-7}{\cancel{x}} \times \dfrac{\cancel{x}}{9}
\\=\dfrac{-7}{9}$
