Question 922113
n the number of nickels as well as the number of dimes
25(12-2n) + 10n + 5n = 125cents
300 - 125 = 35n
 175 = 35n
175/35 = n = 5, the number of nickels as well as the number of dimes
2 Quarters{{{12-2*5)}}}
5 Dimes
5 Nickels
And...checking
2•25 + 5•10 + 5•5 = 50 + 50 + 25 = 125cents  0r $1.25