Answer: 4.5p + 40 = 112
Explanation:
Let p represent the number of pairs of shoes that Roger must sell in a day to meet his daily earnings goal.
Roger gets $40 per day as wages and $4.50 as commission for every pair of shoes he sells in a day. This means that if he sells p shoes in a day, his total earnings for that day is expressed as
4.5p + 40
Since his daily earnings goal is $112, then the equation to determine how many pairs of shoes he must sell to meet his daily earnings goal is
4.5p + 40 = 112