Răspuns :
a + b + c = 123
a = 8
b = 9 * a => b = 9a
b = 9 * 8 => b = 72
8 + 72 + c = 123
c = 123 - 80
c = 43
a = 8
b = 9 * a => b = 9a
b = 9 * 8 => b = 72
8 + 72 + c = 123
c = 123 - 80
c = 43