HELP!!!! 15 points and marked brainliest!!!!
L, M and N are collinear. M is between L and N. LM = 3z + 1, MN = 3z + 1, and LN = 22. use the segment addition postulate to solve for x. Then determine the length of LM.
a: 6
b: 19
c: 3
d: 5

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