Respuesta :

We determine the numerical length of LN as follows:

[tex]LN=LM+MN\Rightarrow4x=x+3[/tex][tex]\Rightarrow3x=3\Rightarrow x=1[/tex]

From this, we replace the value of x and we will get:

[tex]LN=4x\Rightarrow LN=4[/tex]