Question
Find the missing digits. 
1 D E + F E 3 = 3 E 7
(a) D
(b) E
(c) F
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

(c)

Click button first when a symbol is required. X

Find the missing digits. 
1 D E + F E 3 = 3 E 7
(a) D
(b) E
(c) F