If x, y, and z are positive integers and x = 4y = 7z, then the least possible value of x + y + z is	Choose the correct choice from the following choices:
A) 33
B) 40
C) 49
D) 39
E) 84
x + y + z = x/4 + x + x/7   = (7 + 28 + 4 )x/28 =39x/28   39 is not divisible by 28, so for least value, x = 28   Answer - 39
<result>D</result>
If x, y, and z are positive integers and x = 4y = 7z, then the least possible value of x + y + z is