19 2dThe Long March 2D also known as the Chang Zheng 2D, CZ-2D, and LM-2D, is a ChineseThe answer to 19-2d=-20-17d-6 is d=-3; Solve for d: 19-2d=-20-17d-6; The solution is d=-3; Study Tools AI Math Solver Popular Problems Worksheets Study Guides Practice Cheat Sheets