A school librarian can buy books at a 20% discount from the list price. One month she spent $72 for books. What was the list price value of the books?
Is the answer $90?
yes
0.8P = 72,
P = $90.
To find the list price value of the books, we can follow these steps:
1. Let's assume the list price of the books as "x" dollars.
2. The school librarian can buy books at a 20% discount, which means she pays 80% of the list price.
3. We can calculate the amount she paid as: 80% of x = $72.
Now, let's solve the equation to find the value of "x":
0.8x = $72
To isolate x, we divide both sides of the equation by 0.8:
x = $72 / 0.8
Calculating the right side of the equation:
x = $90
Therefore, the list price value of the books is $90, not $72.