Question

Diane has $1.20 in dimes and nickels. She has a total of 13 coins. How many of each kind does she have?

Answer 1

add up the coins:

n+d = 13

add up the values:

5n+10d = 120

Now just solve for n and d.

Answer 2

2 N
11D ?

Answer 3

well, geez, just check your answer

11 dimes and 2 nickels does indeed add up to $1.20