Răspuns:
65, 56, 31
Explicație pas cu pas:
A + B = 121
B + C = 87
A + C = 96
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2A + 2B + 2C = 121 + 87 + 96
2(A + B + C) = 304
A + B + C = 152
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A + B + C - (A + B) = 152 - 121 => C = 31
A + B + C - (B + C) = 152 - 87 => A = 65
A + B + C - (A + C) = 152 - 96 => B = 56
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Alin: 65 kg
Bogdan: 56 kg
Cristian: 31 kg
