Răspuns :
a + b = 857
a - b = 343, le adunam
______________
2a / = 1200
a = 1200 : 2
a = 600
600 + b = 857
b = 857 - 600
b = 257
a - b = 343, le adunam
______________
2a / = 1200
a = 1200 : 2
a = 600
600 + b = 857
b = 857 - 600
b = 257