In the diagram below of triangle P, Q, RPQR, SS is the midpoint of start overline, P, R, end overline
PR
and TT is the midpoint of start overline, Q, R, end overline
QR
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. If S, T, equals, 37, minus, 9, xST=37−9x, and P, Q, equals, minus, 4, x, plus, 32PQ=−4x+32, what is the measure of start overline, P, Q, end overline
PQ
​
?