Question 713433
This solution will be given only part-way through.

d for how many dimes, n for how many nickels.  One dollar is 100 cents.


Account for total coins, d+n=13.
Account for cents, 10d+5n=100.  Divide this cents equation by 5 to get 2d+n=20.


System of Equations to Solve:
2d+n=20
d+n=13