Răspuns :
ok, o scriu algebriic:
a+a+2+a+4+a+6+a+8=40
5a+20=40
5a=20
a=20:4
a=4.
a+2=6.
a+4=8.
a+6=10.
a+8=12.
a+a+2+a+4+a+6+a+8=40
5a+20=40
5a=20
a=20:4
a=4.
a+2=6.
a+4=8.
a+6=10.
a+8=12.