Carol H. answered • 10/07/18

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**Let n = the number of nickels**

**Let d = the number of dimes**

**n + d = 45 d = 45 - n**

**.05n + .10d = 3.50**

**.05n + .10(45 - n) = 3.50**

**.05n + 4.5 - .10n = 3.50**

**-.05n = -1.00**

**n = 20 nickels**

**d = 45 - 20**

**d = 25 dimes**