Question 653101
k over 5 - 1 =7 
IF YOU MEAN:
 K/(5-1)=7
K/4=7 CROSS MULTIPLY
K=4*7
K=28 ANS.

IF YOU MEAN:
K/5-1=7
K/5=7+1
K/5=8 CROSS MULTIPLY.
K=5*8
K=40 ANS.