Answer:
One of the below.
Step-by-step explanation:
12-2=10 2+x=12
The first equation tells you that 
. If you substitute this expression for 
in the second, we have
And we can deduce 
15/5 goes to all of them..
15/5 = 3
First you need to find out the remaining value after he bought the calculator this would be 14.67.
60.54 - 45.87= 14.67
Next youll assume the packs of notebooks all cost the same and divide by 3
14.67 / 3 = 4.89
He spent 4.89 on one pack of notebooks
