What is the diameter of the circle?

2x^2+2y^2-16x=6+6y

Write your answer in simplified, rationalized form.

If you know the radius of the circle, multiply by 2 to get the diameter. The radius is the distance from the center of the circle to the edge. For example, if the radius of a circle is 4 cm, then the diameter is 4 cm x 2 = 8 cm. If you know the circumference of the circle, divide by π to get the diameter.