Question

Trei copii au cules alune .cate alune au cules fiecare ,dacă știm ca Andrei si Bogdan au cules 237 alune ,Andrei si Costel 223 alune, iar Bogdan si Costel 232 alune ?

Answer 1

A+B = 237
A+C = 223
B+C = 232
adunam cele 3 relatii
A+B+A+C+B+C = 237+223+232
2×A+2×B+2×C = 692
2×(A+B+C) = 692
A+B+C = 692:2
A+B+C = 346
C = 346-237 = 109 alune ( Costel)
B = 346-223 = 123 alune ( Bogdan)
A = 346-232 = 114 alune (Andrei)

Verificare:
109+123+114 = 346