19 2dThereafter, we further optimized the interface between SAM and perovskite films, (19) thus snificantly improving the luminance and efficiencyThe 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