x + y - 2x - 15 = 0 Find the Center and Radius

Answer 1

x+y -2x -15 = 0 is probably a misprint

it probably was intended to be

x^2 +y^2 -2x -15 = 0

then

x^2 -2x + 1 + y^2 = 15 +1 = 16

(x-1)^2 + y^2 = 4^2 with radius = 4 and center = (1,0) of a circle