Question

Розвяжи рівняня: 3 9/14х-2 17/21х=1 1/9
6 клас

Answer 1

Ответ:

x = 2/15

Пошаговое объяснение:

$3\frac{9}{14}x - 2\frac{17}{21}x = 1\frac{1}{9}\\\\(3\frac{9}{14} - 2\frac{17}{21})x = 1\frac{1}{9}\\\\x = 1\frac{1}{9} : (3\frac{9}{14} - 2\frac{17}{21})\\\\\\1\frac{1}{9} : (3\frac{9}{14} - 2\frac{17}{21}) = ?\\\\1) 3\frac{9}{14} - 2\frac{17}{21} = 3\frac{27}{42} - 2\frac{34}{42} = \frac{27+42-34}{42} = \frac{35}{42} = \frac{5}{6};\\\\2)1\frac{1}{9} : \frac{5}{6} = \frac{1}{9} * \frac{6}{5} = \frac{1*6}{9*5} = \frac{6}{45} = \frac{2}{15}.\\\\x = \frac{2}{15}$