A straight line has a degree of 180 degrees.
So you are trying to find the angle that is created with the points j,m, and l.
so take the other angle 54 degrees and subtract that by 180.
180-54=126 degrees.
so now that you have the angle of J,M,L set that to equal 3x
3x=126
divide 3 from both sides
x=

so x =42
Let me know if you have any questions.
Read more on Brainly.com -
brainly.com/question/9937300#readmoreThis is the exact same question as I just answered here:
brainly.com/question/9937300
The answer is A. Just remember the acronym for foil.
Answer:
D
Step-by-step explanation:
Because its a line and the only three undefined terms are line,point,plane
It's is true because 4 and 5are closer