$\frac{8}{11} + x = 1\frac{1}{11}$
$x = 1\frac{1}{11} - \frac{8}{11}$
$x = \frac{12}{11} - \frac{8}{11}$
$x = \frac{4}{11}$
Ответ: $x = \frac{4}{11}$

$x - 4\frac{8}{25} = 2\frac{17}{25}$
$x = 2\frac{17}{25} + 4\frac{8}{25}$
$x = (2 + 4) + (\frac{17}{25} + \frac{8}{25})$
$x = 6 + \frac{25}{25}$
x = 6 + 1
x = 7
Ответ: 7

$10 - x = 5\frac{6}{13}$
$x = 10 - 5\frac{6}{13}$
$x = 9\frac{13}{13} - 5\frac{6}{13}$
$x = (9 - 5) + (\frac{13}{13} - \frac{6}{13})$
$x = 4 + \frac{7}{13}$
$x = 4\frac{7}{13}$
Ответ: $x = 4\frac{7}{13}$