Given that Q is the midpoint of PR means,
PQ = QR
But, PQ = 2x + 1 and QR = 5x - 44
Hence we can say that,
2x + 1 = 5x - 44
3x = 45
x = 15
Thus, PQ = 2*15 + 1 = 31,
PQ = 31.
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