Perhatikan gambar berikut ini! besar AQC adalah…. ​

90 = (6x+4) + (5x+9)
90 = 11x + 13
90 – 13 = 11x
77 = 11x
77/11 = x
7 = x

6x+4
6(7)+4
42+4
46 (c)