Respuesta :

-1d-7 is the answer I'm pretty sure

 1, Simplify  7d+d-4d-77d+d−4d−7 to 4d-74d−7

4d-7=5d4d−7=5d


 2.Subtract 4d4d from both sides
-7=5d-4d−7=5d−4d

 3. Simplify 5d-4d5d−4d to dd
-7=d−7=d

 4. Switch sides
d=-7d=−7
5. so your answer would be -7