Respuesta :

I believe this is how you do it
Ver imagen bassman1910
4d - 3 - 2d = -15

2d - 3 = -15      

2d = -15 + 3    add 3 to both sides 

2d = -12          

d = -12/2        divide both sides by 2

d = -6      

hope this helps, God bless!