Question 20143
Let "x" be the number of nickels, of dimes, and of quarters.

The value of the nickels is 5x cents.
The value of the dimes is 10x cents
The value of the quarters is 25x cents.

Equation:
    Value of nickels + Value of dimes + Value of quarters =1320 cents
            5x + 10x + 25x = 1320
                    

Sove for "x".  Then you will know the number of each coin.

Cheers,
Stan H.