Răspuns :
a+b+c=838
a+b=580
----------------(-)
c=838-580
c=258
b+c=652
b+258=652
b=652-258
b=394
a+394=580
a=186
a+b=580
----------------(-)
c=838-580
c=258
b+c=652
b+258=652
b=652-258
b=394
a+394=580
a=186
a + b + c = 838
a + b = 580
b + c = 652
_____________
838 - 652 = 186 ( a)
580 - 182 = 394 ( b)
838 - 580 = 258 ( c )
Verific: 186 + 394 + 258 = 838
a + b = 580
b + c = 652
_____________
838 - 652 = 186 ( a)
580 - 182 = 394 ( b)
838 - 580 = 258 ( c )
Verific: 186 + 394 + 258 = 838