Răspuns :
a+b=571; a=571-b
b+c=326; c=326-b
a+c=523
inlocuim in a+c=523 =>
571-b+326-b=523 =>
897-2b= 523 =>
897-523=2b =>
374=2b => b= 187
a= 571-187=384
c= 326-187=139
V:a-b-c= 384-187-139= 58
a+b=571; a=571-b
b+c=326; c=326-b
a+c=523
inlocuim in a+c=523 => 571-b+326-b=523 => 897-2b= 523 => 897-523=2b => 374=2b => b= 187
a= 571-187=384
c= 326-187=139
V:a-b-c= 384-187-139= 58
b+c=326; c=326-b
a+c=523
inlocuim in a+c=523 => 571-b+326-b=523 => 897-2b= 523 => 897-523=2b => 374=2b => b= 187
a= 571-187=384
c= 326-187=139
V:a-b-c= 384-187-139= 58