Macar 1-2 exercitii...dau PUNCTE ,FALLOW,5 STELE SI COM..VA IMPLOR❤

Răspuns:
4) a+b+c= 612
b= 2×a
c= b+2 》 c= 2a +2
a+ 2a+2a+2= 612
5a+2= 612
5a=600
a= 120
b= 120×2=240
c= 240+2=242
6) a+a+1+a+2+a+3+a+4= 415
5a+ 10= 415
5a= 405
a= 81
b= 82
c=83
d=84
e=85