Răspunsuri

  • Utilizator Brainly
2014-10-10T15:36:05+03:00
2a+b+3c=123
2a+3b+c=77   adunam cele trei relatii si rezulta
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4a+4b+4c=200 /:4  acum impartim relatia la 4 => a+b+c=50