Ответ: -39 6/7
[tex] {7}^{ - 1} - 5 \times {2}^{3} = \frac{1}{7} - 5 \times 8 = \frac{1}{7} - 40 = \frac{1- 280}{7} = - \frac{279}{7} = - 39 \frac{6}{7} [/tex]
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Ответ: -39 6/7
[tex] {7}^{ - 1} - 5 \times {2}^{3} = \frac{1}{7} - 5 \times 8 = \frac{1}{7} - 40 = \frac{1- 280}{7} = - \frac{279}{7} = - 39 \frac{6}{7} [/tex]