Donnie has $5.10 in nickels, dimes, and quarters. he has an equal number of dimes and nickels, with the value of the quarters being $2.40 more than the total value of the dimes and nickels. how many dimes does he have?

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Respuesta :

5.10-2.40 = 270
270/2=135
9 dimes 
9 nickels