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

### Instruction:
 In Rodrigo's classroom in the morning there are red chairs, yellow chairs, and blue chairs. There are 4 red chairs. There are 2 times as many yellow chairs as red chairs, and there are 2 fewer blue chairs than yellow chairs. In the afternoon, Lisa borrows 3 chairs. How many chairs are left in Rodrigo's classroom?


### Response:
 Rot:4
Gelb:2(4)=8
Blau:8-2=<<8-2=6>>6
Insgesamt:4+8+6=<<4+8+6=18>>18
Nachdem Lisa Stühle entfernt hat, bleiben 18-3=<<18-3=15>>15 Stühle im Klassenzimmer übrig.