Simplify the following text for a Grade 12 native English-speaking person.
Original: The Ebers papyrus ( Egypt , 1550 BC ) indicates that ancient Egyptians bathed regularly and combined animal and vegetable oils with alkaline salts to create a soap-like substance .
Simplified: The Ebers papyrus ( Egypt , 1550 BC ) looks like that ancient Egyptians bathed commonly and had animal and vegetable oils with alkaline salts to make a soap-like substance .