Răspuns :
a+b=1032
b+c=433
a+c=1401
----------------- + (Aduni relatiile)
a+b+b+c+a+c=1032+433+1401
2a+2b+2c=2866
b+c=433
a+c=1401
----------------- + (Aduni relatiile)
a+b+b+c+a+c=1032+433+1401
2a+2b+2c=2866