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y - wiek kapitana
x/31 = 23 | *31
x = 713
713 + y/32 = 24 |*32
713 + y = 768
y = 768 - 713
y = 55
Odp. Kapitan miał 55 lat
y=23*31
y=713
x---wiek kapitana
(713+x):32=24
713+x=24*32
713+x=768
x=768-713
x=55
Kapitan miał 55 lat.