Pls help who ever gives a correct answer will get a brainlist and 100 points!!!

Answer:
a+3p
Step-by-step explanation:
l=a+4p-1p
l=a+3p
Hope this helps :)
Answer:
l = a + 3(p)
explanation:
upper length: a+ 4(p)
bottom length: p + l
Therefore,
p + l = a+ 4(p)
l = a + 4(p) - p
l = a + 3(p)