Răspunsuri

  • Utilizator Brainly
2014-10-17T18:00:05+03:00
A+3b=5 /*4 inmultim relatia cu 4 si rezulta  4a+12b=20

c=8 =>5c=5*8=>5c=40

4a+12b+5c=20+40
4a+12b+5c=60
2014-10-17T18:00:49+03:00

a+3b=5

c=8

4a+12b+5c=4*(a+3b)+12b+5*8=4*5+12b+40=20+12b+40=60+12b