Melissa has $2.35 in nickels and dimes. If she has 33 coins in all, how do you find the number of nickels and dimes?
There are always 2 equations in these types of problems.
The first equation is the quantity equation and the second is the value equation.
The value of a nickel is 5 cents, the value of a dime is 10 cents and
I think it's easier to not have decimals, so I will be using the first value equation.
We can rewrite the quantity equation to use substitution:
Substitute this into the value equation: