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

### Instruction:
The age of Gladys is equal to twice the sum of the ages of Billy and Lucas. Billy is 3 times younger than Gladys who is 30 years old now. How old will Lucas be three years from now?

### Response:
 Umri wa Billy ni 30/3 = <<30/3=10>>10 miaka.
Jumla ya umri wa Billy na Lucas ni 30/2 = <<30/2=15>>15 miaka.
Hivyo, Lucas ana umri wa miaka 15 - 10 = <<15-10=5>>5 sasa.
Hivyo, Lucas atakuwa na miaka 5 + 3 = <<5+3=8>>8 baada ya miaka mitatu.