The statement says that, "A meteorologist reported yesterday's high and low temperatures were within 7 degrees of the average temperature of sixty degrees for the day."
This means, at the average of 60 degrees for the day, the temperature can either be 7 degrees high more or 7 degrees less.
60 - 7 =53
60 + 7 = 67
temperature + 7 < 60 < temperature - 7
53 < 60 < 67
