Error analysis 6-x=5x+30

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie

What is the value of x in the following equation? -3x-2=2x+8

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5