zackwhatever zackwhatever 18-03-2022 Mathematics contestada 11. Simplify the equation below. (12x +9y-15) + '. (&x-12 y-20) A. 10x + 3y -15 B. 10x + 3y - 5 C. 10x +3y +15 D. 10x + 3y +5