Răspuns:
a |___|
b |___| +15
c |___|___| +15
suma: 50
50-(15×2)=
50-30=20
20÷4=5 un segment
a = 5
b = 5+15=20
c = (5×2)+15=
10+15=25
P: 5+20+25=
25+25=50 suma