x = 4y - 2 x - 3y = 6 If you were going to solve this equation by substitution, what would your first step look like? A) x - 4y - 2 = 6 B) 4y - 2 - 3y = 6 C) x - 12y - 6 = 6 D) x - 12y + 6 = 6