Answer the question in the picture below

Answer:
LN = 4
Step-by-step explanation:
given M lies on LN , then
LN = LM + MN ( substitute values )
4x = 3 + x ( subtract x from both sides )
3x = 3 ( divide both sides by 3 )
x = 1
Then
LN = 4x = 4 × 1 = 4