Ответ Автор - OPetroW (9/25 - x) + 1/2 = 3/59/25 - x + 1/2 = 3/59/25 - x = 3/5 - 1/29/25 - x = 6/10 - 5/109/25 - x = 1/10x = 9/25 - 1/10x = 18/50 - 5/50 = 13/50 = 0.26