Diketahui belah ketupat PQRS,dengan Sudut PQR=108 dan Sudut QPR = (7x+1). Nilai X =… ?

PQR + 2QPR = 180
108 + 2(7x + 1) = 180
180 + 14x + 2 = 180
14x + 2 = 180 – 108
14x + 2 = 72
14x = 72 – 2
14x = 70
x = 70 :14
x = 5