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jadi 70 +50 +y=180
y= 180 -120=60
4x+20+60=180
4x=100
x=25
16. <ABC= 180-132= 48
<BCA=180-95=85
<CAB= 180-( <ABC+<BCA)
<CAB=180-(85+48)
<CAB=180-133
<CAB= 47