Answer
8.5
Step-by-step explanation:
43 - 3d = d + 9
43 = d + 3d + 9
43 - 9 = 3d + d
34 = 4d
34/4 = 4d/4
8.5 = d
btw its a bit rude just to delete my answer you shouldve just asked for me to show an explanation
