Răspuns :
b - a = 60
2a + 13 = b
a __/
b __/__/ + 13
a __/
b __/ + 60
1segment + 13 = 60
60 - 13 = 47
a = 47
b = 47 + 60 = 107
sau b = 47 * 2 + 13
b = 94 + 13
b = 107
2a + 13 = b
a __/
b __/__/ + 13
a __/
b __/ + 60
1segment + 13 = 60
60 - 13 = 47
a = 47
b = 47 + 60 = 107
sau b = 47 * 2 + 13
b = 94 + 13
b = 107