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

### Instruction:
Nadine collected different colored pebbles. She has 20 white pebbles and half as many red pebbles. How many pebbles does she have in all?

### Response:
Nadine has 20/2 = <<20/2=10>>10 red pebbles
Therefore, she has a total of 20 + 10 = <<20+10=30>>30 pebbles.
#### 30