Respuesta :

popalabdulqayou
28:

lets d is dimes and n nickels

4n=d

.05n+.1d=2.25

.05n+.1d=2.25

.05n+.4n=2.25

.45n=2.25

n= 5 

d=4*5= 20

 so 20 dimes and 5 nickles.