To solve this problem, we need to determine the value of x, which represents the number of years in the future when Maxwell will be twice his sister's age.
We know that Maxwell's sister is currently 2 years old and Maxwell is currently 6 years old.
In x years, Maxwell will be 6 + x years old and his sister will be 2 + x years old.
We can set up the equation as follows:
6 + x = 2(2 + x)
Let's simplify and solve for x:
6 + x = 4 + 2x
To isolate x, we subtract 2x from both sides of the equation:
6 + x - 2x = 4
-x = 4 - 6
-x = -2
Finally, we multiply both sides of the equation by -1 to solve for x:
x = 2
The value of x is 2.
#### 2
The answer is: 2
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
In x years, Maxwell will be twice his sister's age. If his sister is now 2, Maxwell is now 6 years old. What is the value of unknown variable x?

### Answer:
