PERHATIKAN GAMBAR DI SAMPING!
1. x = 11
2. <BOC = 72°
3. <AQC = 76°
Penjelasan dengan langkah-langkah:
1. (6x - 4) + (3x -5) = 90
9x - 9 = 90
9x = 90 + 9
= 99
x = 99/9
= 11
2. (8x - 20) + (4x + 8) = 180
12x - 12 = 180
12x = 180 + 12
= 192
x = 192/12
= 16
<BOC = (4x + 8)°
= (4.16 + 8)°
= (64 + 8)°
= 72°
3. (6x + 4) + (5x + 9) = 90
11x + 13 = 90
11x = 90 - 13
= 77
x = 77/11
= 7
<AQC = (6x + 4)°
= (6.7 + 4)°
= (42 + 4)°
= 46°
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