To solve this problem, you will need to set up a proportion.
Let x = the unknown cost of the books.
[tex]\frac{1}{1.95} = \frac{6}{x}[/tex]
Assuming the cost of books stays constant, you can crossmultiply and solve for x.
x = 1.95(6)
x = 11.70
Six books will cost $11.70 if 1 book cost $1.95.
