Question

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с решением пожалуйста​

Answer 1

$\frac{7}{15} \div ( \frac{6}{10} - \frac{8}{3} ) + 19 \times \frac{2}{31} = \\ = \frac{7}{15} \div \frac{18 - 80}{30} + \frac{38}{31} = \\ = \frac{7}{15} \div \frac{ - 62}{30} + \frac{38}{31} = \\ = - \frac{7}{15} \times \frac{30}{62} + \frac{38}{31} = \\ = - \frac{7}{31} + \frac{38}{31} = \frac{31}{31} = 1$