Suppose that John has a pen that costs $5 and he has 9 similar pens. The total cost of the pens that John has is equal to the cost of his bag. If the cost of the bag is $45, write the verbal model of the situation.
So, cost of each pen = 5
Number of pens = 9
Total cost = 5 * 9
But, it is given that the total cost = cost of the bag and
cost of the bag = 45
So, total cost = 45 and
5 * 9 = 45.
