Question

The cost to rent a rug-cleaning machine from the supermarket is $23 per day. The supermarket charges a check-out fee of $45 for the rental. Tristanne spent $137 to rent the rug-cleaning machine. If d represents the number of days Tristanne rents the machine, which equation can be used to find the value of d?
23 d = 137
23 d + 45 = 137
45 d = 137
45 d + 23 = 137

Answer 1

well we know it can't be the first or third ones b/c they don't include 45 AND 23.
when looking at options 2 and 4, we can see it is option 2 because it says it's $23/day and in equation 4, it is written as $45/day. Therefore, option 2 is the correct one.