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

### Instruction:
Bill and Phil are firehouse Dalmatians. Bill has one less than twice as many spots as Phil. If they have 59 spots combined, how many spots does Bill have?

### Response:
 ให้ x เป็นจำนวนจุดของฟิล
บิลมีจำนวนจุด (2 * x) - 1
x + (2 * x) - 1 = 59
3 * x - 1 = 59
3 * x = 60
x = <<20=20>>20
บิลมีจำนวนจุด 39 จุด