When positive integer x is divided by 12, the quotient is y and the remainder is 3. When 2x is divided by 11, the quotient is 3y and the remainder is 6. What is the value of 21y – x?  Choose the correct answer
A) 3 B) 2 C) - 1 D) - 2 E) - 3

Rationale: "( 1 ) x = 12 y + 3 ( 2 ) 2 x = 33 y + 6 ( 2 ) - ( 1 ) : x = 21 y + 3 21 y - x = - 3 the answer is e ."
Answer: E