Răspuns :
a+b+c=168
b=2a
c=2b⇒ c=4b
a+2a+4a=168
7a=168
a=168:7
a=24
b=2x24
b=48
c=2x48
c=96
V: 24+48+96=168
b=2a
c=2b⇒ c=4b
a+2a+4a=168
7a=168
a=168:7
a=24
b=2x24
b=48
c=2x48
c=96
V: 24+48+96=168