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As stated in the statement of the question, Q is the midpoint, so it divides PR into two equal parts: PQ and PR. In this case it is clear that PQ = PR
PQ = QR
2X + 1 = 5X - 44
3X = 45
X = 15
For PQ:
PQ = 2X + 1
PQ = 2 · 15 + 1
PQ = 30 + 1
PQ = 31
As PQ = QR, then
PQ = QR = 31
For PR:
PR = PQ + QR
PR = 31 + 31
PR = 62
