Răspunsuri

2014-10-28T20:18:37+02:00
2014-10-28T20:19:20+02:00
A=4 
b=2a = 2·4=8
c=a+2b=4+2·4= 12
2a+2b-c=2·4+2·8-12=8+16-12=12