Răspuns :
a - Alin
b - Radu
c - Mihai
a + b + c = 188
2a = b
b + 13 = c
2a + 13 = c
a + 2a + 2a + 13 = 188
5a = 188 - 13
5a = 175
a = 175 : 5
a = 35
2 * 35 = b
b = 70
70 + 13 = 83 ( c )
b - Radu
c - Mihai
a + b + c = 188
2a = b
b + 13 = c
2a + 13 = c
a + 2a + 2a + 13 = 188
5a = 188 - 13
5a = 175
a = 175 : 5
a = 35
2 * 35 = b
b = 70
70 + 13 = 83 ( c )