Respuesta :

Answer:

6

Step-by-step explanation:

3n = n + 12

2n = 12

n = 6

Answer:

6

Step-by-step explanation:

let the number be x , then

3x = x + 12 ( subtract x from both sides )

2x = 12 ( divide both sides by 2 )

x = 6

That is the number is 6