When 0.5(20x – 50y + 36) – 0.25(–100x + 40y – 12) is simplified, what is the resulting expression? 10 x minus 25 y + 18 minus 25 x + 10 y minus 3 Negative 15 x minus 15 y + 15 Negative 10 x + 25 y + 18 + 25 x minus 10 y + 3 35 x minus 35 y + 21