A store sells small notebooks for ​$6 and large notebooks for ​$12. If a student buys 6 notebooks and spends ​$60​, how many of each size did he​ buy?

He bought ? small notebooks and ? large notebooks

(It says to type whole numbers as well)

as with the money problem, count the numbers and the costs:

x+y = 6
6x+12y = 60