Tolong segera dijawab saya mepet waktu

A = P
B = Q
C = R
D = S

AB = PQ
BC = QR = 16 cm
CD = RS = 8 cm
AD = PS = 12 cm

< C = < R = 98°
< D = < S = 107°
< D = (4x + 5y)° = 107°
< R = (7x - 4y)° = 98°

4x + 5y = 107 (× 4)
7x - 4y = 98 (× 5)

16x + 20y = 428
35x - 20y = 490
------------------------ +
51x = 918
x = 918/51
x = 18

7x - 4y = 98
7(18) - 4y = 98
126 - 4y = 98
4y = 126 - 98
4y = 28
y = 28/4
y = 7

2x + y
= 2(18) + 7
= 36 + 7
= 43 (C)