Notam cu a ,b si c cele 3 numere
a = 4×b
a = c + 143 => a - c = 143
c = b - 17 => b = c + 17
a |____|____|____|____| + (4×17)
b |____|+17
c |____|
4 segmente egale + 68 - 1 segment egal = 3 segmente egale + 68 = 143
143 - 68 = 75
75 : 3 = 25 (un segment egal)
a = 4×25+68 = 100 + 68 = 168
b = 25+17 = 42
c = 25
Verificare:
168 - 25 = 143
a = 168
b = 42
c = 25