If x=2y=4z, what is y-z, in terms of x?
Select.
A) 2x
B) x/2
C) x/4
D) 3x/5
E) 3x/7
x=2y=4z   x/4 = z   and y = x/2   y-z = x/2 - x/4 = x/4   Answer is x/4
<result>C</result>
If x=2y=4z, what is y-z, in terms of x?