Tìm x biết \(2\frac{x}{7} = \frac{{75}}{{35}}\)

* Hướng dẫn giải

\(\begin{array}{l}
2\frac{x}{7} = \frac{{75}}{{35}}\\
2 + \frac{x}{7} = \frac{{15}}{7}\\
\frac{x}{7} = \frac{{15}}{7} - 2\\
\frac{x}{7} = \frac{1}{7}\\
 \Rightarrow x = 1
\end{array}\)