Respuesta :
Answer:
PR = 2
Step-by-step explanation:
PQ + QR = PR, substitute values
5x - 4 + x = 2x, that is
6x - 4 = 2x ( subtract 2x from both sides )
4x - 4 = 0 ( add 4 to both sides )
4x = 4 ( divide both sides by 4 )
x = 1
Thus PR = 2x = 2 × 1 = 2