If she has three times as many $1 bills as she has $5 bills, and only half as many $20 bills as $5 bills, how many of each type of bill does she have?

Question

THe problem has to equal $72.

Answer 1

Let the number of $5 bills = x

Let the number of $1 bills = 3x

Let the number of $20 bills = 0.5x

 

 

We can write an equation based on the description.

 

5(x) + 1(3x) + 20(0.5x) = 72

 

5x + 3x + 10x = 72

 

18x = 72

 

 

Divide both sides of the equation by 18.

 

x = 4

 

 

Substitute this value of x into each dollar type.

 

Number of $5 bills = 4

Number of $1 bills = 12

Number of $20 bills = 2