Find the equation of the circle passing through the points

Find the equation of the circle passing through the points of intersection of the circles L1 ekuivalen x^2 + y^2 - 6x + 2y + 4 = 0 and L2 ekuivalen x^2 + y^2 + 2x - 4y - 6 = 0 ,and with its centre on the line, y = x .