Răspunsuri

2014-04-12T17:33:01+03:00
A+6b = 2b + c
a= -4b + 120

-4b + 120 + 4b + 5*120 - 719 = 

120 + 600 - 719 = 1

2014-04-12T17:33:15+03:00
A+sb=2b+c deci a+6b-2b+c, a+4b=c, a+4b=120, E=120+ 5 ori 120 -719= 120+600-719=720-719=1