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System of Linear Equations - Stamps

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A stamp collection consists of 3, 8, and 15 cent stamps. The number of 8 cent stamps is one less than triple the number of 3 cent stamps. The number of 15 cent stamps is six less than the number of 8 cent stamps. The total value of all the stamps is $2.47. Find the number of 8 cent stamps in the collection?

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This is a problem on a System of Linear Equations.

Let the number of 3 cent stamps be x, the number of 8 cent stamps be y and the number of 15 cents stamps be z.

Then ...

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