Question

$3 -\frac{9}{14} \times - 2 \frac{17}{21} \times = 1\frac{1}{9}$
Даю 15 балов срочно! ​

Answer 1

Ответ:238/435

Пошаговое объяснение:

$3-x(\frac{9}{14}+2\frac{17}{21})=1\frac{1}{9} \\3-x(2\frac{27+34}{42})= 1\frac{1}{9} \\\\3-3\frac{19}{42}x=1\frac{1}{9}\\ 3\frac{19}{42}x=3-1\frac{1}{9}\\\\ 3\frac{19}{42}x=1\frac{8}{9}\\\\ \\x=1\frac{8}{9}:3\frac{19}{42}\\x=\frac{17}{9}*\frac{42}{145}\\ x= \frac{17}{3}*\frac{14}{145}\\\\x=\frac{238}{435}$