Respuesta :

Answer:

p = 21

Step-by-step explanation:

-9 + p = 12

We want to isolate the p.

To do this, add 9 to each side.

This will help us find the value of p.

-9 + p = 12

+9        +9

p = 21

We have isolated the p.

By doing this, we figured out that p = 21

p = 21

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