Question

реши уровнение а+4/24=4/7
​

Answer 1

$a + \frac{4}{21} = \frac{4}{7}$

$a = \frac{4}{7} - \frac{4}{21}$

$a = \frac{12}{21} - \frac{4}{21}$

$a = \frac{12 - 4}{21}$

$a = \frac{8}{21}$