Tìm x biết \(\begin{array}{l} \left( { - 1\frac{3}{5} + 2x} \right):\frac{{12}}{{13}} = 2\frac{1}{6} \end{array}\)
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Lời giải:
Báo sai\(\begin{array}{l} \left( { - 1\frac{3}{5} + 2x} \right):\frac{{12}}{{13}} = 2\frac{1}{6}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - \frac{8}{5} + 2x = \frac{{13}}{6}.\frac{{12}}{{13}}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2x = 2 + \frac{8}{5}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2x = \frac{{18}}{5}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = \frac{{18}}{5}:2 = \frac{9}{5} \end{array}\)
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