mn+nk=35
mk+nk=29
mn+mk=26
mn+nk + mk+nk + mn+mk = 35 + 29 + 26
2(mn + nk + km) = 90
mn + nk + km = 45
mk = km = 45 - mn - nk = 10
kn = nk = 45 - mn - mk = 19
mn = nm = 45 - mk - nk = 16
Пошаговое объяснение:
