Noah and kate are shopping for new guitar strings in a music store. noah buys 2 packs of strings. kate buys 2 packs of strings and a music book. the book costs $16. their total is $72. how much is one pack of strings?

One pack of strings is $14. This is because 72-16=56. I subtracted the 16 because it is how much the book cost, so it does not have anything to do with the amount one pack of strings cost. Then, I divided 56 by 4 which equals 14. I divided 56 by 4 because the question is how much one pack is, and Noah and Kate bought a total of 4 packs. This proves that one pack of strings costs $14. 

Hope this helps you!

It’s 24.6 after you round to the nearest tenths the answer should be 25.0