Răspuns:
a + b + c = 900
b = 3×a
b = c - 25 ==> c = b +25
a |_____|
b |_____|_____|_____|
c |_____|_____|_____|+25
900 - 25 = 875
875 : 7 = 125 (un segment egal)
a = 125
b = 3 × 125 = 375
c = 3 × 125 + 25 = 375 + 25 = 400
Verificare:
125 + 375 + 400 = 900