Explicación paso a paso:
[tex] \frac{ {a}^{m} }{ {a}^{n} } = {a}^{m - n} \\ {a}^{m} \times {a}^{n } = {a}^{m + n} [/tex]
[tex] \frac{ {3}^{4} \times {3}^{x} }{ {3}^{9} } = {3}^{5} = \\ = \frac{ {3}^{4} \times {3}^{10} }{ {3}^{9} } = \frac{ {3}^{14} }{ {3}^{9} } = {3}^{5} [/tex]
espero te sirva
