Реши уточнение (ו9-8):5=25-5
9х - 8):5 = 20 9х - 8 = 20*5 9х - 8 = 100 9х = 100 + 8 9х = 108 Х= 108 : 9 Х = 12 ---------- Проверка (12* 9 -8):5 = 25-5 (108 - 8):5 = 20 100 : 5 = 20 20 = 20