Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Tina a 12 stylos roses. Elle a 9 stylos verts de moins que de stylos roses. Tina a 3 stylos bleus de plus que de stylos verts. Combien de stylos Tina a-t-elle au total ?


### Response:
 Tina a 12 - 9 = <<12-9=3>>3 stylos verts.
Tina a 3 + 3 = <<3+3=6>>6 stylos bleus.
Au total, Tina a 12 + 3 + 6 = <<12+3+6=21>>21 stylos.