Answer: N = [tex]\frac{4}{p}[/tex]
Step-by-step explanation: Since you can't do N = 4 or P = 4, you'll need to make those 2 into one.
1. Divide each term in np = 4 by p.
2. Cancel the common factors of P.
2a. Divide n by 1.
Hence, the answer is [tex]n=\frac{4}{p}[/tex]