Read the following prompt and type your response in the space provided.
Karen is writing a word problem that can be represented by the equation 2x + 3 = 13.

A bucket weights 2 grams and balls are put into it that each weight 3 grams. The total weight of the bucket and balls is 13 grams. How many balls are in the bucket?

Does her word problem fit the equation? Justify your response..