Tìm x, biết: \(\Large\dfrac{4}{7} : x =\dfrac{5}{15}\) \(\Large x =\df

Tìm x, biết:

\(\Large\dfrac{4}{7} : x =\dfrac{5}{15}\)

• A.

  \(\Large x =\dfrac{11}{7}\)

• B.

  \(\Large x =\dfrac{12}{7}\)

• C.

  \(\Large x =\dfrac{13}{7}\)

• D.

  \(\Large x =\dfrac{14}{7}\)

\(\Large\dfrac{4}{7}\) : x =  \(\Large\dfrac{5}{15}\)

\(\Large x =\dfrac{4}{7} : \dfrac{5}{15}\)

\(\Large x =\dfrac{4}{7}\times\dfrac{15}{5}\)

\(\Large x =\dfrac{12}{7}\)