No her word problem does not fit the equation. The equation has a starting, unchanging value of 3. But the word problem has a starting, unchanging value of 2 (the bucket weighs 2 grams).
The equation has an x coefficient of 2. But the word problem has a x coefficient of 3 (balls are put into [the bucket] that each weigh 3 grams), where x, the unknown variable, is the number of balls.
Although the numbers are the same, Karen switched the 2 and 3 values when going from the equation to the problem.