X-2/5-3x+2/6=2/3-x решите уровнение
X - 2/5 - 3x + 2/6 = 2/3 - x x - 3x + x = 2/5 - 2/6 + 2/3 - x = 2/5 + 1/3 - x = 11/15 x = - 11/15