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

### Instruction:
Norma takes her clothes to the laundry. She leaves 9 T-shirts and twice as many sweaters as T-shirts in the washer. When she returns she finds 3 sweaters and triple the number of T-shirts. How many items are missing?

### Response:
 Idadi ya sweta ambazo Norma alizipeleka kwenye kusafisha ni 9 * 2 = <<9*2=18>>18
Aliporudi, alikuta fulana 3 * 3 = <<3*3=9>>9
Jumla ya nguo ambazo Norma alizipeleka kwenye kusafisha ni 9 + 18 = <<9+18=27>>27
Jumla ya nguo ambazo Norma alizikuta ni 9 + 3 = <<9+3=12>>12
Nguo ambazo zimepotea ni 27 - 12 = <<27-12=15>>15