Question

Найди 2y если y= ( 6 3/4 × 2/9 + 2 5/7 ) × 7/59 - 2/5

Answer 1

Найдём у:

$y = (6\frac{3}{4} *\frac{2}{9} +2\frac{5}{7} )*\frac{7}{59} -\frac{2}{5}$

$y = (1\frac{7}{14} +2\frac{10}{14} )*\frac{7}{59} -\frac{2}{5}$

$y=4\frac{3}{14}*\frac{7}{59} -\frac{2}{5}$

$y=\frac{5}{10} - \frac{4}{10}$

$y=\frac{1}{10}$

Найдём 2у:

$2y=\frac{1}{10} *\frac{2}{1} (2)$

$2y=\frac{1*1}{5*1}$

$2y=\frac{1}{5}$

Ответ: 2у = $\frac{1}{5}$.

Удачи!!!