<human>:  Tina has 12 pink pens. She has 9 fewer green pens than pink pens. Tina has 3 more blue pens than green pens. How many pens does Tina have in total?
<bot>: How many green pens does Tina have? ** Tina has 12 - 9 = <<12-9=3>>3 green pens.
How many blue pens does Tina have? ** Tina has 3 + 3 = <<3+3=6>>6 blue pens.
How many pens does Tina have in total? ** In total Tina has 12 + 3 + 6 = <<12+3+6=21>>21 pens
#### 21