A cash register contains 15 coins in nickles and dimes. total value is $1.25. how many coins of each type are there?

5 nickels and 10 dimes

Step-by-step explanation:

d = dimes n=nickels

d+n=15 125=5n+10d

d=15-n 125-5n=10d

Substitute

125-5n=10 (15-n)

125-5n=150-10n

125+5n=150

5n=25

n=5

5 nickels leaving 10 dimes which if you were to solve it out you get the right amount of money