Question

Реши уравнения :х +4/21 =2/3 +2/7

Answer 1

$x+ \frac{4}{21} = \frac{2}{3} + \frac{2}{7}$
$x= \frac{2}{3}+ \frac{2}{7} - \frac{4}{21}$
$x= \frac{20}{21} - \frac{4}{21}$
$x= \frac{16}{21}$
Ответ:$\frac{16}{21}$