Express using algebra. Five more than twice x.

What is always true when two whole numbers are subtracted?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

Agroup of three friends order a combo meal which includes two slices of pizza and a drink each drink is priced at $2.50 the combined total of $31.50 how much is the cost of a slice of pizza