



 
Hi William, It is best if you first write a, b & c in terms of n. Looking at c, we know n must either be 17 or 95 or else c is not a positive integer. Now we need to determine whether 17 or 95 will result in a positive integer value for a. The n value of 95 results in a negative a value so we discard this answer so the value of a is 80. Hope this Helps, Janice  


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