You can get rid of the fraction by multiplying throughout by 8: -64+n=-80. Add 64 to each side: n=-16. How to handle negatives? Think of positives as steps forward and negatives as steps backward. -64 is 64 steps backward; -80 is 80 steps backward, but if we take 64 steps forward after taking 80 backward we end up just 16 steps backward from where we started. That's -16. Put this value in the original equation to check it out: -8+(-16/8)=-8-2=-10. Checks out! (8 steps back and one eighth of 16 steps back (2 steps back) is 10 steps back.)