a+b = 112
b+c = 164
a+c = 130
adunam cele 3 relatii si astfel aflam suma celor 3 numere
2×a +2×b + 2×c = 112+164+130
2×(a+b+c) = 406
a+b+c = 406 :2
a+b+c = 203
c = 203-112 = 91
a = 203-164 = 39
b = 203-130 = 73
verificare:
39+73+91 = 203
Raspuns:
a = 39
b = 73
c = 91