rearrange this equation to show the centre-radius form of the equation of a circle. State the coordinates of the center and the radius of the circle

9y^2 + 7x^2 + 35 = 8x - 2x^2 - 36y

So far i have...

9y^2 + 7x^2 + 35 = 8x - 2x^2 - 36y

9x^2 - 8x + 9y^2 + 36y + 35 = 0

x^2 - (8/9)x + y^2 + 4y = -35/9

just a bit stuck now....