Jawabanmu

2014-06-10T17:01:41+07:00
1. x+2x+3x = 180
6x = 180
x = 180 : 6
x = 30
jd x = 30
2x = 2*30
= 60
3x = 3*30
= 90
2014-06-10T17:43:55+07:00