Răspuns :
a+b+c=10
a=2
b=a+5=2+5=7
a+b+c=10
2+7+c=10
9+c=10
c=10-9
c=1
a+b+c=2+7+1=9+1=10 (adevărat )
a=2
b=a+5=2+5=7
a+b+c=10
2+7+c=10
9+c=10
c=10-9
c=1
a+b+c=2+7+1=9+1=10 (adevărat )