To find the equation representing Jason's situation, we can set up a simple equation based on the information given.
Let's denote the amount of money Jason had in savings before the purchase as \( x \). After making a purchase of $250, his remaining amount is $136.25.
The equation can be set up as follows:
\[ x - 250 = 136.25 \]
This equation states that the amount Jason had before the purchase minus the purchase amount equals what he has left.