163-x=-52 equals what as the answer

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.