Billy's age is 30/3 = <<30/3=10>>10 years old.

The sum of the ages of Billy and Lucas is 30/2 = <<30/2=15>>15.

So, Lucas is 15 - 10 = <<15-10=5>>5 years old now.

Therefore, Lucas will be 5 + 3 = <<5+3=8>>8 years old three years from now.

# Answer

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<|im_start|>system
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<|im_start|>user
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?
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user
8
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?
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