67085-к:90=59397 700·(83400:m)=420000 (n+10986)·50=589650

1) 67.085 - k : 90 = 59.397 - k : 90 = 59.397 - 67.085 - k : 90 = - 7.688 k : 90 = 7.688 k = 7.688 * 90 k = 691.920 проверка: 67.085 - 691.920 : 90 = 59.397 67.085 - 7.688 = 59.397 59.397 = 59.397 2) 700 * (83.400 : m) = 420.000 83.400 : m = 420.000 : 700 83.400 : m = 600 m = 83.400 : 600 m = 139 проверка: 700 * (83.400 : 139) = 420.000 700 * 600 = 420.000 3) (n + 10.986) * 50 = 589.650 n + 10.986 = 589.650 : 50 n + 10.986 = 11.793 n = 11.793 - 10.986 n = 807 проверка: (807 + 10.986) * 50 = 589.650 11.793 * 50 = 589.650 589.650 = 589.650