In ΔPQR, overline{PR}

PR

is extended through point R to point S, text{m}angle PQR = (3x+12)^{circ}m∠PQR=(3x+12)

∘

, text{m}angle RPQ = (3x-11)^{circ}m∠RPQ=(3x−11)

∘

, and text{m}angle QRS = (8x-9)^{circ}m∠QRS=(8x−9)

∘

. What is the value of x?x?