x/6 + x/12 + x = -5/3 |*12
(12x)/6 + (12x)/12 + 12x = (-5*12)/3
2x + x + 12x = -20
15x = -20
x = -1 1/3
ответ: -1 1/3
x/6 + x/12 + x = -5/3 |*12
(12x)/6 + (12x)/12 + 12x = (-5*12)/3
2x + x + 12x = -20
15x = -20
x = -1 1/3
ответ: -1 1/3