Question 497134
n+d+q=58
n=2d-3
q=(58-d-(2d-3));q=61-3d
.05(2d-3)+.1d+.25(61-3d)=7.40
5(2d-3)+10d+25(61-3d)=740
10d-15+10d+1525-75d=740
1510-55d=740
55d=770
d=14
n=25
q=19
Plato has 25 nickels, 14 dimes, and 19 quarters..