## Elementary Algebra

$\dfrac{-7}{9}$
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: $\require{cancel} \\=\dfrac{-7}{\cancel{x}} \times \dfrac{\cancel{x}}{9} \\=\dfrac{-7}{9}$