Tìm x biết ​\(\begin{array}{I} - x - \frac{7}{2} = \frac{4}{{11}} \end{array} \)

* Hướng dẫn giải

Ta có:

 \(\begin{array}{I} - x - \frac{7}{2} = \frac{4}{{11}}\\ - x = \frac{4}{{11}} + \frac{7}{2}\\ - x = \frac{{85}}{{22}}\\ x = - \frac{{85}}{{22}} \end{array} \)