5. Решите уравнение: a) x - 8/15 * x = 4 1/5

1) x - 8/15 * x = 4 1/5; 2) 15/15*x - 8/15*x = 21/5; 3) 7/15x = 21/5; 4) x = 21/5 * 15/7; 5) x= (21 * 15)/(5 * 7) ; 6) x = 315/35 = 9. Ответ: x = 9