67085-К:90=59375
700.(83400:m)=420000

1)67.085 - К : 90 = 59.375- К : 90 = 59.375 - 67.085- К : 90 = - 7.710К : 90 = 7.710К = 7.710 * 90К = 693.900проверка: 67.085 - 693.900 : 90 = 59.37567.085 - 7.710 = 59.37559.375 = 59.3752)700 * (83.400 : m) = 420.00083.400 : m = 420.000 : 70083.400 : m = 600m = 83.400 : 600m = 139проверка:700 * (83.400 : 139) = 420.000700 * 600 = 420.000420.000 = 420.000