Question

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Answer 1

Ответ:

139.

а) 1.75

б) 0,75

Пошаговое объяснение:

$x + \frac{7}{8} = 2 \frac{5}{8} \\ 2 \frac{5}{8} = \frac{21}{8} \\ x + \frac{7}{8} = \frac{21}{8} \\ x = \frac{21 - 7}{8} \\ x = \frac{14}{8} \\ x = 1 \frac{6}{8} = 1 \frac{3}{4} \\ x = 1.75$

$x + 1 \frac{7}{8} = 2 \frac{5}{8} \\ 1 \frac{7}{8} = \frac{15}{8} \\ 2 \frac{5}{8} = \frac{21}{8} \\ x + \frac{15}{8} = \frac{21}{8} \\ x = \frac{21}{8} - \frac{15}{8} \\ x = \frac{6}{8} = \frac{3}{4} \\ x = 0.75$