(8 2/5:x+3 5/9) : 4 1/6 =1 1/3
(8 2/5х + 3 5/9) : 4 1/6 = 1 1/3, (42/5х + 32/9) : 25/6 = 4/3, 42/5х + 32/9 = 4/3 * 25/6, 42/5х + 32/9 = 50/9, 42/5х = 50/9 - 32/9, 42/5х = 18/9, х = 18/9 : 42/5, х = 18/9 * 5/42, х = 5/21
спасибо
пожалуйста)))))