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((PLEASE HELP URGENT))

Points P, Q R, and S are collinear Point Q is between P and R. R is between Q and S, and PQ=RS, If PS = 27 and PR= 21, what is the value of QR? ​

((PLEASE HELP URGENT)) Points P, Q R, and S are collinear Point Q is between P and-example-1

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Hi my name is Vanessa
User Luke Griffiths
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