If LM=3x, and MN=2x+2, and LN=42, what is LM?
We have a straight line, LMN, with 3 points on it, L, M, and N.
We are told that the length LM = 3x and that the length MN = 2x + 2.
Adding the length LM to to MN gives us the length of LN. i.e.,
3x + (2x + 2) = 42
5x + 2 = 42
5x = 40
x = 8
3x = 24
Therefore, the length of LM is: 24