Question

дам 30 балов !!!!!!!!

Answer 1

Ответ:

$x + \frac{4}{7} - \frac{9}{14} = \frac{1}{4 } \\ x - \frac{1}{14} = \frac{1}{4} \\ x = \frac{1}{4} + \frac{1}{14} \\ x = \frac{9}{28}$