Notam cu a,b,c cele 3 carti
a+b+c = 525 ( pagini)
c = 2×b
a = b:2 => b = 2×a
a |___|
b |___|___|
c |___|___|___|___|
Avem 7 segmente egale = 525
525 : 7 = 75 ( un segment)
a = 75
b = 2×75 = 150
c = 4×75 = 300
Verificare:
75+150+300 = 525
75 pagini are prima carte
150 pagini are a 2-a carte
300 pagini are a 3-a carte
