A certain store sells only black shoes and brown shoes. In a certain week, the store sold x black shoes and y brown shoes. If 1/4 of all shoes sold that week were black, which of the following expressions represents the value of y, in terms of x?
Select the correct option.
A) x/3  B) x/2  C) 2x/3  D) 3x  E) 2x
x/(x+y) = 1/4   4x = x+y   3x = y   y = 3x   Answer 3x
<result>D</result>
A certain store sells only black shoes and brown shoes. In a certain week, the store sold x black shoes and y brown shoes. If 1/4 of all shoes sold that week were black, which of the following expressions represents the value of y, in terms of x?