Respuesta :

Answer: 3x + 36

Step-by-step explanation:

⇒ ( 3) ( x + 12)

⇒(3) (X) + (3) (12)

⇒   The final answer is 3x + 36

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3x+36

3*x+3*12

3x+36

You times 3 times x and 3 times 12