$-\frac{1}{3}x - \frac{1}{4}x + \frac{1}{5}x = 1\frac{8}{15}$
$-\frac{20}{60}x - \frac{15}{60}x + \frac{12}{60}x = \frac{23}{15}$
$-\frac{35}{60}x + \frac{12}{60}x = \frac{23}{15}$
$-\frac{23}{60}x = \frac{23}{15}$
$x = \frac{23}{15} : (-\frac{23}{60})$
$x = \frac{23}{15} * (-\frac{60}{23})$
$x = \frac{1}{1} * (-\frac{4}{1})$
x = −4
Ответ: −4

$2\frac{5}{6}x - 3\frac{3}{4}x - 1\frac{5}{12}x = -1\frac{5}{9}$
$2\frac{10}{12}x - 3\frac{9}{12}x - 1\frac{5}{12}x = -1\frac{5}{9}$
$2\frac{10}{12}x - 4\frac{14}{12}x = -1\frac{5}{9}$
$-2\frac{4}{12}x = -1\frac{5}{9}$
$-2\frac{1}{3}x = -1\frac{5}{9}$
$x = -1\frac{5}{9} : (-2\frac{1}{3})$
$x = \frac{14}{9} : \frac{7}{3}$
$x = \frac{14}{9} * \frac{3}{7}$
$x = \frac{2}{3} * \frac{1}{1}$
$x = \frac{2}{3}$
Ответ: $x = \frac{2}{3}$