Tìm x biết ​\( - \frac{3}{4} - \left( {x + \frac{1}{2}} \right) = 1\frac{2}{3}\)

* Hướng dẫn giải

\(\begin{aligned} & - \frac{3}{4} - \left( {x + \frac{1}{2}} \right) = 1\frac{2}{3}\\ & - \frac{3}{4} - \left( {x + \frac{1}{2}} \right) = \frac{5}{3}\\ & - \left( {x + \frac{1}{2}} \right) = \frac{5}{3} + \frac{3}{4}\\ & - \left( {x + \frac{1}{2}} \right) = \frac{{29}}{{12}}\\ &x + \frac{1}{2} = - \frac{{29}}{{12}}\\ &x = - \frac{{29}}{{12}} - \frac{1}{2}\\ &x = - \frac{{35}}{{12}} \end{aligned}\)