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4. Michelle has 19 coins in her pocket. She has $2.00 made up of nickels, dimes and quarters. She has twice as many nickels

4. Michelle has 19 coins in her pocket. She has $2.00 made up of nickels, dimes and quarters. She has twice as many nickels as dimes. Write a system of equations and then use matrices to determine how many of each coin Michelle has.

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