Question 762444

k/5 + 4 = 4/5
Common denominator = 5
k + 20 = 4
     k = 4 - 20
     k = -16
Proof:
k/5 + 4 = 4/5
-16/5 + 20/5 = 4/5
         4/5 = 4/5
Hope this helps.
;-)