Question
The cost of 6 paperbacks and 4 manuals is $25.20. The cost of 3 paperbacks and 4 manuals is $19.20. What is the cost of 7 paperbacks and 7 manuals?
4 m

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The cost of 6 paperbacks and 4 manuals is $25.20. The cost of 3 paperbacks and 4 manuals is $19.20. What is the cost of 7 paperbacks and 7 manuals?