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m+n=p
m+n+p=71
m+n=63
m+p=64


Răspuns :

m+n=p
m+n+p=71
m+n=63
m+p=64
63+p=71=>p=71-63 p=8
m+8=64=>m=64-8 m=56
56+n=63=>n=63-56 n=7
coroana?