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Maths Puzzle
Algebra
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x^2-5x=14
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How to (a) write the system of linear equations represented by the augmented matrix. Once the system is written,(b) use back substition to find its solution.
1. -3 -2 15
A rectangular picture measures 8� by 11� before it is framed. The frame has a uniform width, and the total area of the picture and the frame is 238 square inches. What is the width of the frame?