In Sam's collection, there are ten more black pens than blue pens and twice as many blue pens as pencils. There are also eight pencils and two fewer red pens than pencils. How many pens in all are there in Sam's collection?
8 x 2 = <<8*2=16>>16 are blue pens.
16 + 10 = <<16+10=26>>26 are black pens.
8 - 2 = <<8-2=6>>6 are red pens.
Therefore, there are 16 + 26 + 6 = <<16+26+6=48>>48 pens in all in Sam's collection.
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