To find the answer, we first must write an equation.
($17.90+(X Notebooks)) + 6% Sales Tax = $30.74
Now, we solve the equation for X.
First, we have to find the total before the sales tax. To do this, we divide the total by 1.06
$30.74/1.06= $29
Now, we subtract the cost of the backpack and solve for X
$17.90+X=$29
X=11.10
Given that X is the total of 6 Notebooks, we divide $11.10 by 6 to find the price for each Notebook.
$11.10/6=$1.75 per notebook
It costs $1.85 for each notebook before sales tax and $1.96 after sales tax.
