Răspuns :
a+b+c=70
c=2b =2*2a(b)=4a
b=2a
a+2a+4a=70
7a=70
a=10
b=2a=20
c=4a=40
c=2b =2*2a(b)=4a
b=2a
a+2a+4a=70
7a=70
a=10
b=2a=20
c=4a=40
a+ax2+ax4=70
7a=70
a=70:7
a=10
b=10x2
b=20
c=10x4
c=40
V:10+20+40=70
Sper ca te-am ajutat!