Question

Elizabeth had a book delivered to her home. The total cost included the price of the book, 7% sales tax on the price of the book, and a $4.50 shipping charge. Elizabeth paid a total of $31.25.

What was the pre-tax price of the book?

$

Answer 1

okay first calculate the value she had to pay only for the book and the tax

Answer 2

26.75$

Answer 3

okay 26.75 is the value of the book and the 7% of the books cost. Agreed?

Answer 4

yes.

Answer 5

We can form an equation
\[x+ (0.07x)=26.75\]

Answer 6

7% =7/100 =0.07
Clear so far?

Answer 7

yes.

Answer 8

solve for x
Can you do it?

Answer 9

I think it's 1.87.

Answer 10

no..
x+0.07x=26.75
1x+0.07x=26.75
1.07x=26.75
so whats the value of x now

Answer 11

3.82?

Answer 12

divide 1.07 on both sides
1.07 26.75
-----x = -----
1.07 1.07


x= 26.75
-------
1.07

Answer 13

were did you get a 1.07?

Answer 14

x+0.07x=26.75
1x+0.07x=26.75
1.07x=26.75

Answer 15

ohhh okay.