Respuesta :

Answer:D. n = 9

Step-by-step explanation:

n/12 = 3/4 // - 3/4

n/12-3/4 = 0

1/12*n-3/4 = 0 // + 3/4

1/12*n = 3/4 // : 1/12

n = 3/4/1/12

n = 9

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