Im not ur average math genius and i need help to put this problem into an algebraic equation. (Headbang)(Headbang)

Lois rides her bike to visit a friend. She travels at 10 mi/h. While shes there, it starts to rain. Her friend drives her home in a car traveling 25mi/h. It takes her 1.5 hours longer to get to her friends house then it did to get back home. How many hours did it take Lois to ride to her friend's house?

PLZ HELP ME QUICKLY!!!!!