Решите уравнение:
1) $\frac{4}{15} + x = \frac{11}{15}$;
2) $\frac{16}{21} - x = \frac{9}{21}$;
3) $x - \frac{4}{35} = \frac{12}{35}$.
$\frac{4}{15} + x = \frac{11}{15}$
$x = \frac{11}{15} - \frac{4}{15}$
$x = \frac{7}{15}$
$\frac{16}{21} - x = \frac{9}{21}$
$-x = \frac{9}{21} - \frac{16}{21}$
$-x = -\frac{7}{21}$
$x = \frac{7}{21}$
$x - \frac{4}{35} = \frac{12}{35}$
$x = \frac{12}{35} + \frac{4}{35}$
$x = \frac{16}{35}$
Пожауйста, оцените решение
