Answer:
[tex]\$675[/tex]
Step-by-step explanation:
Remember that
[tex]100\%-35\%=65\%=65/100=0.65[/tex]
Let
x ----> the total cost of the books
we know that
The total cost of the book multiplied by 0.65 must be equal to $438.75
so
The linear equation that represent this situation is
[tex]0.65x=438.75[/tex]
solve for x
[tex]x=438.75/0.65\\x=\$675[/tex]