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Isaiah has $7.15 in Dimes and Nickels.He has a total of 91 coins.How many good each coin does he have?

 Jan 27, 2020
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7.15  total

 

x = nickel             amount in nickles    .05 x

91 -x  = dimes      amount in dimes     .10 (91-x)      these two amounts summed together = 7.15

 

.05 x       +     .10 (91-x)     =       7.15

                                                                     solve for 'x' the number of nickels       then  #dimes =  91-x

 Jan 27, 2020

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