Question

tìm x
x nhân \(\dfrac{1}{2}\)=\(\dfrac{1}{3}\)                                     b,x : \(\dfrac{4}{5}\)=\(\dfrac{5}{2}\)                      c,\(\dfrac{2}{9}\) : x = \(\dfrac{2}{3}\)

Answer 1

\(a,x=\dfrac{1}{3}:\dfrac{1}{2}\\ x=\dfrac{1}{3}.\dfrac{2}{1}\\ x=\dfrac{2}{3}\\ ----------\\ b,x=\dfrac{5}{2}\times\dfrac{4}{5}\\ x=\dfrac{4}{2}=2\\ ----------\\ c,x=\dfrac{2}{9}:\dfrac{2}{3}\\ x=\dfrac{2}{9}\times\dfrac{3}{2}\\ x=\dfrac{3}{9}=\dfrac{1}{3}\)

Answer 2

a, X x \(\dfrac{1}{2}\) = \(\dfrac{1}{3}\)

    X         = \(\dfrac{1}{3}\) : \(\dfrac{1}{2}\)

    X         =      \(\dfrac{2}{3}\)

b, X : \(\dfrac{4}{5}\) = \(\dfrac{5}{2}\)

    X       = \(\dfrac{5}{2}\) x \(\dfrac{4}{5}\)

    X       =       2

c, \(\dfrac{2}{9}\) : X = \(\dfrac{2}{3}\)

          X = \(\dfrac{2}{9}\) : \(\dfrac{2}{3}\)

          X = \(\dfrac{1}{3}\)