If 5/(4 + 1/x) = 1, then x =
Choose the most appropriate option
A) 3
B) 1
C) 1 / 3
D) - 1 / 3
E) - 3

Rationale: "the expression 5 / ( 4 + 1 / x ) = 1 should have been equal to something . if 5 / ( 4 + 1 / x ) = 1 = > 5 x / ( 4 x + 1 ) = 1 = > 5 x = 4 x + 1 = > x = 1 correct option : b"
Answer: B