Answer: The required expression for amount left in her bank after the donation is given by

Explanation:
Since we have given that
Amount of her saving = $45.71
Number of packs of markers to donate to her school = 6
Let the cost of each pack of markers be 'x'.
So, Amount left in her bank account after the donation is given by

Hence, the required expression for amount left in her bank after the donation is given by
