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9x+9 =90°
9x =90°-9
9x =81°
x =81:9
x =9
Besar sudut SQR=3x+5=(3x9)+5=27+5=32°
6.(8x-20)+(4x+8)=180°
12x-12 =180°
12x =180+12
12x =192
x =192:12
x =16
Besar pelurus AOC=8x-20=(8x16)-20=128-20=108°
7.(6x+4)+(5x+9)=90°
11x+13 =90°
11x =90-13
11x =77°
x =77:11
x =7
Besar penyiku AQC=6x+4=(6x7)+4=42+4=46°
8.90°+30°=120°
9.90°+45°=135°
Semoga bermanfaat ^_^
9x + 9 = 90
9x = 81
x = 9
sudut SQR = 3.9 + 5 = 27