Let n represent the cost of 1 notebook.
Let p represent the cost of 1 pencil.
3n + 2p = 5.10
2n + 3p = 4.65
The total cost of 1 notebook and 1 pencil is simply n + p. The quickest way to proceed is to add the two equations together:
5n + 5p = 9.75
Divide both sides by 5 to get:
n + p = 1.95, ans.