4x-4=2(x-4)
4x-4=2x-8
4x-2x=-8+4
2x=-4 /:2
x=-2
4x - 4 = 2(x-4)
4x - 4 = 2x-8
4x - 4 + 4 = 2x - 8 +4
4x = 2x - 4
4x - 2x = 2x - 4 - 2x
2x = - 4
x = -2