If x = y+3+4.5x and y = x+18, what is the value of y/x ?  Select
A) -6/5.  B) -7/20.  C) 1/4.  D) -20/7.  E) 1.5.
(1) x = y + 3 + 4.5x   Substitute y for y = x + 18 (Eq. we are given)   x = x + 18 + 3 + 4.5x   Combine like terms   x = 5.5x + 21 --&gt; -4.5x = 21 --&gt; x = -14/3   (2) y = x + 18   Substitute x for x = -14/3   y = (-14/3) + 18 = 40/3   (3) x/y = ?   Substitute x and y we found above   y/x = (40/3) /(-14/3) = (40/3) * (-3/14) = -40/14 = -20/7   My answer: -20/7.
<result>D</result>
If x = y+3+4.5x and y = x+18, what is the value of y/x ?