Answer:
Many.
Explanation:
4(1-p) = -4p +4
or 4(1 -p) = -4(p-1)
or 4(1-p) = -4[-(1-p)]
or 4(1-p) = 4(1-p)
Here, left hand side is equal to left hand side. Therefore, it can be true for any value of p; that is, it has infinite number of solutions.
4-4p=-4p+4
=4-4=-4p+4p
=0=p
p=0
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