If 42.24 = k(14 + m/50), where k and m are positive integers and m < 50, then what is the value of k + m ?	Options:
A) 6
B) 7
C) 8
D) 9
E) 10

Rationale: 42.24 = 14 k + km / 50 . . . we can rewrite the number as follows : 42 + 0.24 = 14 k + km / 50 . . . . . . . . since k is integer , then 42 = 14 k . . . . . . . . . . k = 3 0.24 = km / 50 . . . . . . 24 / 100 = 3 m / 50 . . . . . . m = 4 k + m = 3 + 4 = 7 answer : b
Answer: B