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2x+30+3x-10 = 180
5x +20 = 180
5x = 180-20
5x = 160
x = 160/5
x = 32
sudut A = 2(32) + 30= 94°
sudut B = 3(32) - 10 = 86°
2x+30 + 3x-10=180
5x+20=180
5x=180-20
x= 160/5= 32
sdt A= 2.32 + 30 = 64+30=94
sdt B= 3.32-10=96-10=86