Answer: See below
Explanation:
p-(p+20) = 4(p-5) + 3p
p-p-20 = 4p - 20 + 3p
-20 = 7p -20
40 = 7p
40/7 = p
Equality, people had their own place in the social structure
Plate Tectonics, that would be the answer <span />
heat, wind, moisture/ humidity, dryness, natural disasters