I am having the hardest time trying to solve this equation, can someone please help? It's Geometry's line segments.

Answer:
KL = 6
Step-by-step explanation:
IJ + JK +KL = IL
9+ 11 + KL = 26
Combine like terms
20 + KL = 26
Subtract 20 from each side
20+KL -20 =26-20
KL = 6