8-6=

Oh! I know this one.. uhh..    ...two! Yeah...      ...yeah! It equals two!

10.

Proof: 8=6+2

8/0=(6+2)/0

8/0 * 0 =6+2

0=6+2

-2=6

Plug into the questioner's expression

8-(-2)=

8+2= 10