Sagot :
[tex]2a,2a+2,2a+4,2a+6,2a+8\\\\
2a+2a+2+2a+4+2a+6+2a+8=0\\\\
10a+20= 0\ \ \ \ | subtract\ 20\\\\
10a=-20\ \ \ \ | divide\ by\ 10\\\\
a=-2\\\\
Numers\ are: \ -2,0,2,4,6.[/tex]
[tex]2n+2n+2+2n+4+2n+6+2n+8=0\\
10n+20=0\\
10n=-20\\
n=-2\\\\
2n=-4\\
2n+2=-2\\
2n+4=0\\
2n+6=2\\
2n+8=4\\\\
\boxed{\{-4,-2,0,2,4\}}[/tex]