Question

Five binders and three folders cost $23. Five binders and one folder cost $20. How much does one binder cost?

Answer 1

Answer: $3.7

Explanation:

23-20=3

3/2=1.5

20-1.5=18.5

18.5/5=3.7

Answer 2

one binder for $3.70

Explanation:

The cost of 5 binders and 3 folders = $23.00

The cost of 5 binders and 1 folder = $20.00 [ 2 folders less ]

Cost of 2 folders = 23 - 20 = $3.00

Cost of 1 folder =
`(3)/(2)` = $1.50

The cost of 5 binders = 20.00 - 1.50 = $18.50

The cost of 1 binder =
`(18.50)/(5)`

= $3.70

The cost of one binder is $3.70