Answer: The equation would be 5x - 10 = 275
Step-by-step explanation: The correct equation to determine the number of marbles that Jaalan has is 5x - 10 = 275, where x represents the number of marbles.
To solve, first add 10 to each side:
5x = 285
Next, divide each side by 5:
X = 57
Therefore, Jaalan has 57 marbles.