x.14/3 = 2,5

Lời giải:

\[x.\frac{{14}}{3} = 2,5\]

\[x.\frac{{14}}{3} = \frac{5}{2}\]

\[x = \frac{5}{2}:\frac{{14}}{3}\]

\[x = \frac{5}{2}.\frac{3}{{14}}\]

\[x = \frac{{15}}{{28}}\].

Vậy \[x = \frac{{15}}{{28}}\].