每日一题

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

答案和解析

答案：D

解析：

The statement given in words translates into the equation x+(2*y)=y+(2*y)+5. This simplifies to 3*x=(3*y)+5. Then (3*x)-(3*y)=5, and so 3*(x-y)=5.It follows that x-y=(5/3).