Simplify the expression: 5[x−2(y−x)]5[x - 2(y - x)]5[x−2(y−x)].
15x−10y15x - 10y15x−10y
5x−10y5x - 10y5x−10y
15x+10y15x + 10y15x+10y
x−2yx - 2yx−2y