A teacher grades students’ tests by subtracting twice the number of incorrect responses from the number of correct responses. If Student A answers each of the 100 questions on her test and receives a score of 73, how many questions did Student A answer correctly? Choose the most appropriate option.
A) 55 B) 60 C) 73 D) 82 E) 91

Rationale: let the number of correct responses be x then the number of incorrect responses = 100 - x according to question x - 2 ( 100 - x ) = 73 ( subtracting twice of incorrect from correct ) 3 x = 273 x = 91 answer : e
Answer: E