Răspunsuri

  • Utilizator Brainly
2014-10-17T18:19:39+03:00
2a+3b=5 /*2  inmultim cu 2 relatia si rezulta 4a+6b=10
2c+b=7

4a+6b=10
2c+b=7       adunam cele doua relatii 
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4a+7b+2c=17