Respuesta :

parallelogram , opposite sides are equal

so

PR = QS

and

PQ = RS

4x - 1 = 3x + 7

x = 8


PQ = 4(8) - 1 = 32 -1 = 31

Given P = 74 cm


74 - 2(31) = 12

PR = QS = 12/2 = 6


Answer

QS = 6 cm


Answer: 6 Cm is the write answer hope this helps