a + b + c = 2766
a = 2×b+14
c = (a+b):2
a |_____|_____|_____|_____|+14
b |_____|_____|
c |_____|_____|_____|+7
9 segmente egale (+14+7) = 2766
2766 - 21 = 2745
2745 : 9 = 305 (un segment egal)
a = 4×305+14 = 1234
b = 2×305 = 610
c = 3×305+7 = 915+7 = 922
verificare
1234 + 610 + 922 = 2766