In the equation 2x â€“ cy = 18, c is a constant. If the value of y is 2 when x is 6, what is the value of x when y is 2 ?  Choose the correct choice.
A) âˆ’9/2	B) -4	C) -3	D) 6	E) 9/2
2x - cy = 18   x=6, y=2;   12-2c=18   c=-3   2x-cy=18   when y=3, c=-3, x=   x=6   ANSWER:6
<result>D</result>
In the equation 2x â€“ cy = 18, c is a constant. If the value of y is 2 when x is 6, what is the value of x when y is 2 ?