Question

11d + 17d – -3d + -12d – 17d = -12

Answer 1

11d + 17d - (-3d) + (-12d) - 17d = -12

11d + 17d + 3d -12d - 17d = -12

2d = -12      |divide both sides by 2

d = -6

Answer 2

$11d + 17d - -3d + -12d - 17d = -12$ 

$11d+17d+3d-12d-17d=-12$ 

$2d=-12$ 

$d=- \dfrac{12}{2}$ $Divide \ both \ sides \ by \ 2$

$d=-6$