Răspuns :
a + b + c = 286
a + b = 226
c = b : 3
b = 3 × c
c = 286 - 226
c = 60
b = 3 × 60
b = 180
a = 226 - b
a = 226 - 180
a = 46
a + b + c = 286
a + b = 226
c = b : 3
b = 3 × c
c = 286 - 226
c = 60
b = 3 × 60
b = 180
a = 226 - b
a = 226 - 180
a = 46