Răspuns :
c=(a+b+c)-(a+b)=59-40=19
a=(a+b+c)-(b+c)=59-42=17
b=(a+b+c)-(a+c)=59-(19+17)=59-36=26
a=17
b=26
c=19
a=(a+b+c)-(b+c)=59-42=17
b=(a+b+c)-(a+c)=59-(19+17)=59-36=26
a=17
b=26
c=19
40+c=59 c=59-40 c=19 b+19=42 b=42-19 b=23 a+23=40 a=40-23=17 a=17 b=23 c=19