Tìn x biết \(\begin{array}{l} 1\frac{4}{3} - 2x + \frac{3}{7} = \frac{2}{3} - \left( {\frac{{ - 5}}{6}} \right) \end{array}\)
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Lời giải:
Báo sai\(\begin{array}{l} 1\frac{4}{3} - 2x + \frac{3}{7} = \frac{2}{3} - \left( {\frac{{ - 5}}{6}} \right)\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2x = 1\frac{4}{3} + \frac{3}{7} - \frac{2}{3} - \frac{5}{6}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2x = \frac{7}{3} + \frac{3}{7} - \frac{2}{3} - \frac{5}{6}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2x = \frac{{98}}{{42}} + \frac{{18}}{{42}} - \frac{{24}}{{42}} - \frac{{35}}{{42}}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2x = \frac{{53}}{{42}}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = \frac{{53}}{{84}} \end{array}\)
