Solve: xx−4=4x−4+2\dfrac{x}{x - 4} = \dfrac{4}{x - 4} + 2x−4x=x−44+2.
x=12x = 12x=12
x=4x = 4x=4 (extraneous)
x=−4x = -4x=−4
x=8x = 8x=8