Răspuns :
A+b+c=98 76+c=98 c=98-76=22 b+22=53 b=53-22=31 a+31=76 a=76-31=45
a + b + c = 98
a + b = 76
b + c = 53
c = 98 - 76
c = 22
a = 98 - 53
a = 45
b = 98 - 22 - 45
b = 31
a + b = 76
b + c = 53
c = 98 - 76
c = 22
a = 98 - 53
a = 45
b = 98 - 22 - 45
b = 31