56,678 - k = 243,0243 - 231,16
56,678 - k = 11,8643
k = 56,678 - 11,8643
k = 44,8137
Проверка: 56,678 - 44,8137 = 243,0243 - 231,16
11,8643 = 11,8643
ответ: k = 44,8137
56,678 - k = 243,0243 - 231,16
56,678 - k = 11,8643
k = 56,678 - 11,8643
k = 44,8137
Проверка: 56,678 - 44,8137 = 243,0243 - 231,16
11,8643 = 11,8643
ответ: k = 44,8137