If <PQR and <RQS form a linear pair, they are supplementary or add up to 180. So, (5x+5) + (11x-65) = 180 ... Combining like terms, it would be : 16x-60=180. 16x=240, x=15. They've asked for the measure of <PQR, so substitute it in! 5x+5= 5(15) +5= 80.
