Let's say the price of each pack of batteries is x dollars.
So, Jim paid 2x dollars for both packs of batteries.
The change to Jim's account balance after buying 2 packs of batteries was -$23.94.
Therefore, 2x = $23.94.
If Jim had only bought 1 pack of batteries, he would have paid x dollars.
The change to his account balance would have been 1x = x dollars.
To find the change to his account balance had he only bought 1 pack of batteries, we need to find the value of x.
From the equation 2x = $23.94, we can divide both sides by 2 to solve for x:
x = $23.94 / 2 = $11.97.
Therefore, the change to Jim's account balance had he only bought 1 pack of batteries would have been -$11.97.
Correct answer: −$11.97