9514 1404 393
Answer:
   $68.00
Step-by-step explanation:
Let s represent the opening price. Then the closing price is ...
   s - 3.25% × s = $65.79
   s(1 -0.0325) = $65.79 . . . . collect terms
   0.9675s = $65.79 . . . . . . . simplify
   s = $65.79/0.9675 . . . . . . .divide by the coefficient of s
   s = $68.00 . . . . . the opening stock price