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gaseste suma a + b + c, stiind ca: a+4b+3c=821 3b+2c=497

Răspuns :

a+4b+3c=821
3b+2c=497

a+(3b+2c)+b+c=821
a+b+c+497=821
a+b+c=821-497
a+b+c= 324