First p=23 and because if u do the math right that is what u should get
The first step would be to combine like terms which is 3p and p so your equation would look like:
4p - 7 = 13
In the second step you would add 7 to both sides which would give you:
4p = 20
The third and last step would be to divide both sides with 4 which would give you your answer:
p = 5
