Tina has 12 - 9 = <<12-9=3>>3 green pens.

Tina has 3 + 3 = <<3+3=6>>6 blue pens.

In total Tina has 12 + 3 + 6 = <<12+3+6=21>>21 pens

# Answer

21
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
21
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?
train