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

### Instruction:
Stacy has 32 berries. Steve takes 4 of Stacy's berries, and still has 7 less berries than Stacy started with. How many berries did Steve start with?

### Response:
 กำหนดให้ x เป็นจำนวนลูกส้มที่สตีฟเริ่มต้นมี
x+4=32-7
x+4=25
x=<<21=21>>21 ลูกส้ม