Răspuns :
a + b= 429
a - 2b = 114
a = 114 +2b
114 + 2b +b = 429
114 + 3b = 429
3b = 429 - 114
3b = 315
b = 315 : 3
b = 105
a = 114 + 2 x 105 = 324
a - 2b = 114
a = 114 +2b
114 + 2b +b = 429
114 + 3b = 429
3b = 429 - 114
3b = 315
b = 315 : 3
b = 105
a = 114 + 2 x 105 = 324