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Mathematics, 04.08.2019 10:00 DASASDAEDWEDA

Hannah has only nickels and dimes in her wallet. she has a total of $2.50 and a total of 30 coins how many nickels does she have using system of equations? i really need you guys i don’t know how to solve this

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Hannah has only nickels and dimes in her wallet. she has a total of $2.50 and a total of 30 coins ho...
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