the number of students at parkville high school is 21 less than 2 times the number of students at midtown middel school which expression could be used to represent the total number of students at parkville high school is s represents the number os students at midtown middle school
The number of students is represented with S, to show 2 times that number it is shown as 2S, a less than is word problem jargon for minus. So it is 2S-21.
