To solve this problem, we need to determine the value of x, which represents the speed of Danielle relative to Cameron.
We know that Cameron drives at twice the speed of Chase. Therefore, if Chase takes 180 minutes to travel from Granville to Salisbury, Cameron will take half the time, which is 180/2 = 90 minutes.
We also know that Danielle drives at x times the speed of Cameron. Therefore, if Cameron takes 90 minutes, Danielle will take 90/x minutes.
We are given that Danielle takes 30 minutes to travel from Granville to Salisbury.
We can set up the equation as follows:
90/x = 30
Let's simplify and solve for x:
90 = 30x
To isolate x, we divide both sides of the equation by 30:
90/30 = 30x/30
3 = x
The value of x is 3.
#### 3
The answer is: 3
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Cameron drives at twice the speed of his brother, Chase.  But Danielle drives at x times the speed of Cameron.  If it takes Danielle 30 minutes to travel from Granville to Salisbury, how long, in minutes, It will take Chase 180 to travel from Granville to Salisbury. What is the value of unknown variable x?

### Answer:
