Răspuns :
a+b =960/6
a+b =160
a =b/3
b/3+b =160
b+3b =480
4b =480
b =120
a=b/3 =120/3 =40
v ; 40+120 =160
a+b =160
a =b/3
b/3+b =160
b+3b =480
4b =480
b =120
a=b/3 =120/3 =40
v ; 40+120 =160