Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
If x + (2 x) is 5 more than y +(2 y), then x -y =
(A) -5
(B) -(5 / 3)
(C) 3 /5
(D) 5 /3
(E) 5
The correct answer is D
Explanation
The statement given in words translates into the equation x+2x=y+2y+5. This simplifies to 3x=3y+5. Then 3x-3y=5, and so 3 (x -y) =5.
It follows that x -y = (5 / 3).