x - y = 14.137
x : y = 7 rest 67 => x = 7y + 67
7y + 67 - y = 14.137
6y = 14137 - 67
6y = 14.070
y = 14070 : 6
y = 2.345
x = 2345 + 14.137
x = 16.482
x + y = 16.482 + 2345 = 18.827