I have 20 bills consisting of $5 and $10. If the total amount of my money is $130, how many of each

I have 20 bills consisting of $5 and $10. If the total amount of my money is $130, how many of each bill do i have?

Let f be $5 bills and t be $10 bills, we have:
f + t = 20
5f + 10t = 130

Using our system of equation solver, we get:

• f = 14
• t = 6