Price of 3 pens without discount
A stationery store sells a dozen ballpoints pens for $3.84, which represents a 20% discount from the price charged when a dozen pens are bought individually. How much does it cost to buy three pens?
Let x be the price of a dozen ballpoints pens without the 20% discount.
x - 20%x = 3.84
x - 0.20x = 3.84
0.80x = 3.84
x = 3.84/0.80
x = 4.8
4.8 is the price for 12 ballpoints pen with no 20% discount.
The price of 1 ballpoints pen is 4.8 / 12 = 0.4
The price of 3 pens is 3 × 0.4 = 1.2
Click here to post comments
Join in and write your own page! It's easy to do. How? Simply click here to return to Algebra word problems.
Aug 22, 19 05:03 PM
How to test for symmetry - Graphs of relations can have two different types of symmetry.
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.