A shop charges a fixed delivery fee of 20 taka plus 6 taka for each pen. If the total cost is 104 taka, how many pens were ordered?
Note
Let x be the number of items. The equation is 20 + 6x = 104. Subtract 20: 6x = 84. Divide by 6, so x = 14. The fixed fee is not part of the item count.