Răspunsuri

  • Utilizator Brainly
2014-10-02T22:16:53+03:00
A+2b+c=51
2a+b+2c=42 
___________  adunam cele doua relatii si rezulta
3a+3b+3c=93 /:3 ( dam factor comun pe 3 )
a+b+c=31
9 4 9
2014-10-02T22:26:21+03:00
A+2b+c=51
2a+b+25=42
se adunasi se obtine 3a+3b+3c=93
se da facror comun3si rezulta
3(a+b+c)=93
a+b+c=93:3
a+b+c=31
9 4 9