Tìm X: 2/7 * X = 2/3 x= 2/3 / 2/7 x = 2/3 * 7/2 x= 7/3

* Hướng dẫn giải

$\begin{array}{l}\frac{2}{7}\times x=\frac{2}{3}\\ x=\frac{2}{3}:\frac{2}{7}\\ x=\frac{2}{3}\times \frac{7}{2}\\ x=\frac{7}{3}\end{array}$