a,b,c numerele
a+b+c=40
b=3×a
b=c:2=>c=2×b
a ----------
b ---------- ------------ ------------
c ---------- ---------- ----------- ----------- ---------- ---------
avem 10 (1+3+6) segmente egale
40:10=4 (un segment)
a = 4
b = 3×4=12
c = 6×4=24
verificare:
a+b+c=4+12+24=40