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A+B+C=500
A+B =375
B+C=294
A=?
B=?
C=??



Răspuns :

375 + C =500
C = 500 - 375
C = 125

B + 125 = 294
B =  294 - 125
B =  169

A + 169 = 375
A = 375 - 169
A = 206