To solve for x and find the length of AM when M is the midpoint of AB, we can use the concept of ratios to determine that x = x/2. Therefore, the length of AM is x units.
The correct answer to the given question is option A.
To solve for x and find the length of AM when M is the midpoint of AB, we can use the concept of ratios. Let's assign the length of AB as 2x and the length of AM as x.
Since M is the midpoint, we know that AM is half the length of AB. So, x = (1/2)(2x) = x.
Therefore, the length of AM is x units.
From the given options, the correct answer is A. x = 2; AM = 4 units.