Răspuns :
a+b+c=40
a=b+5
c=b+8
inlocui in prima relatie
b+5+b+b+8=40
3b+13=40
3b=40-13
3b=27
b=27:3
b=9
a=9+5
a=14
c=9+8
c=17
a=b+5
c=b+8
inlocui in prima relatie
b+5+b+b+8=40
3b+13=40
3b=40-13
3b=27
b=27:3
b=9
a=9+5
a=14
c=9+8
c=17
a+b+c=40
a. /-----/+5/
b. /-----/ }40
c. /-----/+8/
40-5-8=27
27:3=9
a=9+5 a=14
b=9
c=9+8 b=17
a. /-----/+5/
b. /-----/ }40
c. /-----/+8/
40-5-8=27
27:3=9
a=9+5 a=14
b=9
c=9+8 b=17