Answer :
[tex]8-\frac{4}{5}f>-14-2f\ \ \ \ \ |\cdot5\\\\40-4f>-70-10f\\\\-4f+10f>-70-40\\\\6f>-110\ \ \ \ \ |:6\\\\f>-\frac{110}{6}\\\\f>-\frac{55}{3}\\\\f\in(-\frac{55}{3},\infty)[/tex]
8-4/5f>-14-2f
(subtract 8 on both sides)
-4/5f>-22-2f
(add 2f on both sides)
6/5f>-22
(divide 6/5 on both sides)
f>-55/3(-18.33)