Question

Tìm x biết

\(3\dfrac{1}{2}:0,4=x:1\dfrac{1}{7}\)

Answer 1

\(\dfrac{7}{2}\) : \(\dfrac{2}{5}\) = x : \(\dfrac{8}{7}\)

x : \(\dfrac{8}{7}\) = \(\dfrac{7}{2}\) : \(\dfrac{2}{5}\)

x : \(\dfrac{8}{7}\) = \(\dfrac{35}{4}\)

x       = \(\dfrac{35}{4}\) . \(\dfrac{8}{7}\)

x = 10

Answer 2

10

Answer 3

\(\dfrac{7}{2}\)\(:\dfrac{2}{5}\)\(=x:\dfrac{8}{7}\)

\(\dfrac{35}{4}=x:\dfrac{8}{7}\)

\(x=\dfrac{35}{4}:\dfrac{8}{7}=\dfrac{245}{32}\)

Vậy \(x=\dfrac{245}{32}\)