Answer :
sum of 8e and 20 = 8e + 20
Subtract 60 ... = 8e + 20 - 60 = 8e - 40
When e = 7
8e - 40 = 8 (7) - 40 = 56 - 40 = 16
Subtract 60 ... = 8e + 20 - 60 = 8e - 40
When e = 7
8e - 40 = 8 (7) - 40 = 56 - 40 = 16