math
posted by peter .
If x=6y, which of the following is a multiple of x?
a. 12y
b. 9y
c. 5y
d. 4y
e. 3y

multiples are often considered whole number multipliers.
nx=n*6y
if n=2, then the first answer is right. 
say y =1
then x = 6
12 y = 12 which is a multiple of 6
so 12 y is a multiple of x