5n + 10d + 25q = 380,

n = 2d,

q = 3d.

Combine it together:

5*(2d) + 10d + 25*(3d) = 380, or

10d + 10d + 75d = 380, or

95d = 380. 

Hence, d =  = 4 dimes.

Now, n = 2d = 8 nickels and q = 3d = 12 quarters.

Let number of dimes be D

Then number of nickels = 2D

Number of quarters: 3D

Equation requested: ______.1D + .1D + .75D = 3.8_______.95D = 3.8



If you wish to go further, D, or number of dimes = 4 

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