There are 13 items - 1 eraser = <<13-1=12>>12 pens and pencils.

There are 12 items / 3 = <<12/3=4>>4 pencils.

# Answer

4
Question:
Tommy has 13 items in his pencil case. The pens are twice as many as the pencils and there's one eraser. How many pencils are there?
Answer:
Let's think step by step.

user
4
Tommy has 13 items in his pencil case. The pens are twice as many as the pencils and there's one eraser. How many pencils are there?
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