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

### Instruction:
Lisa has 18 more dresses than Ana. If the number of their dresses combined is 48, how many dresses does Ana have?

### Response:
 Acha x iwe idadi ya mavazi ambayo Ana ana.
Lisa ana mavazi x+18.
x+x+18=48
2x+18=48
2x=30
x=<<15=15>>15
Ana ana mavazi 15.