1. Determine the required side length of the triangle using the given expressions

Determine the value \(QR\) of the triangle \(PQR\) if \(QS =\) 29\(x +\) 5 \(feet\) and \(SR =\) 28\(x +\) 21 \(feet\) and \(S\) is the midpoint of \(QR\).