The LCD of the three denominators, (x-2), 5x, and 3x, is the smalles multiplier that is divisible on all three.
Factors of 5x => 5 * x
Factors of 3x => 3 * x
Factors of (x-2) => (x-2) * 1
Since 5x, and 3x, both have x, we can just rule out the first x, and multiply the rest
The LCD therefore is