Tìm x biết: x. 1/2 x:4/5 = 5/2 2/9 :x = 2/3

\(a)x.\frac{1}{2} = \frac{1}{3}\)

\(x = \frac{1}{3}:\frac{1}{2} = \frac{2}{3}\)

b) \(x:\frac{4}{5} = \frac{5}{2}\)

\(x = \frac{5}{2}.\frac{4}{5} = \frac{{20}}{{10}} = 2\)

c) \(\frac{2}{9}:x = \frac{2}{3}\)

\[x = \frac{2}{9}:\frac{2}{3}\]

\[x = \frac{2}{9}.\frac{3}{2}\]

\[x = \frac{3}{9} = \frac{1}{3}\]