If 5x=6y=z, what is x+y, in terms of z?  Pick:
A) z/2	B) 2z	C) z/3	D) 11z/30	E) z/9
5x=6y=z   x = z/5   and y = z/6   x+y = z/5 + z/6 = 11z/30   Answer is 11z/30
<result>D</result>
If 5x=6y=z, what is x+y, in terms of z?