



 
Hi Gwen, Your question doesn't make sense to me. I think it should say
You can use guess and check to solve this problem. He has more holiday tune boxes than patriotic tune boxes so lets start with a guess of 2 music boxes that play patriotic tunes. The number of boxes he has that play holiday tunes is 5 more than this so he has 3 + 5 = 8 music boxes that play holiday tunes. Thus in total he has 2 + 8 = 10 music boxes. But we know that he has 13 music boxes so the numbers we tried are too small. A better guess would be 3 music boxes that play patriotic tunes. What happens then? Penny  


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