ada yg tau nggk nomor 12 a.b. klo tau jwb yh thanks

a. nilai x adalah:
   2x +16 = 4x
   2x - 4x = -16
   -2x       = -16
   x          = -16/-2
               = 8

b. ∠POQ = 2x + 16
               = 2(8) + 16
               = 32°
    ∠SOR = 32°
    ∠QOR = 180-32
                = 148°
    ∠POS = 148°