Respuesta :

Answer:

d equals 9

Step-by-step explanation:

3= (21-6)divided(d-4)

Thus we get 3d-12=15

3d=27

d=9

Answer: D=9

Step-by-step explanation:

3= (21-6)divided(d-4)

Thus we get 3d-12=15

3d=27

d=9

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