Tìm ẩn x biết \(\left( {\frac{{2x}}{3} - 3} \right):( - 10) = \frac{2}{5}\)

* Hướng dẫn giải

 \(\begin{aligned} &\left( {\frac{{2x}}{3} - 3} \right):( - 10) = \frac{2}{5}\\ &\frac{{2x}}{3} - 3 = \frac{2}{5}.\left( { - 10} \right)\\ &\frac{{2x}}{3} - 3 = - 4\\ &\frac{2}{3}x = - 4 + 3\\ &\frac{2}{3}x = - 1\\ &x = - \frac{3}{2} \end{aligned}\)