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? Pick one.
A) 3	B) 2	C) -1	D) -2	E) -3
(1) x = 12y+3   (2) 2x = 33y+6   (2)-(1): x=21y+3   21y-x=-3   The answer is -3.
<result>E</result>
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?