Răspuns :
a+b = 58
b+c =67
a+b+c =100
58 +c =100 c=100 -58 =42
a+67 =100 a=100 -67 =33
b+42 = 67 b=67-42 =25
b+c =67
a+b+c =100
58 +c =100 c=100 -58 =42
a+67 =100 a=100 -67 =33
b+42 = 67 b=67-42 =25