 
 <prompt> ```The total of the three numbers na 500. If the first number na 200, and the value of the second number na twice the value of the third number, find the value of the third number.``` <response>: ```Make we say the third number na x.
The sum of the second and third number na 500-200 = 300
Since the third number na x, the sum of the values of the second and third number na x+2x = 300
This na 3x=300
The value of the third number na x=300/3
x=100

The final answer: 100.``` 