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a+b+c=762
b+c=575
a aflati nr a b c


Răspuns :

A= 762-575
A= 187
B= 187+145
B= 332
C=762-(187+332)
C=762-519
C=243
Verificare: 187+332+243=762
762-575=187 a 
187+145=332 b
575-332=243 c