Susan has 8 more dimes than she has nickels in her pocket, Is she has a total of $3.05, how many times does she have?

Let the number of nickels be x, the number of dimes is x+8

but

1 nickel=$0.05

1 dime=$0.1

thus, the total amount Susan has will be:

0.05x+0.1 (x+8) = 3.05

0.05x+0.1x+0.8=3.05

0.15x=2.25

x=2.25/0.15

x=15

thus the number of nickels is 15

number of dimes is 15+8=23