a+b=5068
a-b=432 ⇒ a=b+432
b+432+b=5068
b+b=5068-432
2b=4636
b=4636:2
b=2318
a=2318+432
a=2750
V: 2750+2318=5068
2750-2318=432
.....................................................
a=b+432
l..........l = b
l..........l + 432 =a
a+b=5068
l..........l+l.........l=5068-432=4636
l..........l=4636:2=2318 = b
l..........l+432=2318+432=2750 = a