Irene R. answered 02/26/20
BS in Mechanical Engineering and Certified math teacher for 13 years
You can solve this problem by creating an equation and solving it.
Let's let p represent the cost of the pencil.
Then we can write the following expression for the cost of the notebook: p + 2
Now we can write and solve this equation for the total cost:
Total cost = cost of pencil + cost of notebook
$2.30 = p + p + 2
2.30 = 2p + 2
2.30 - 2 = 2p + 2 - 2
0.30 = 2p
0.30/2 = 2p/2
$0.15 = p
The cost of the pencil will be $0.15