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Unformatted text preview: solve them! 16. Three times one number plus a second number is 40, and the one number minus the second number is 4. 17. The seats in a small concert hall are divided into sections A and B. Section A tickets are $18, while Section B tickets are $12. If 138 tickets are sold for a total of $1986, how many seats in each section were purchased? 18. A candy shop mixes M&M’s worth $2 per pound with trail mix worth $1.50 per pound. Find how many pounds of each should be used to get 50 pounds of a mixture worth $1.80 per pound....
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 Spring '08
 HELENIUS
 Determinant, Equations

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