Jawabanmu

2014-05-02T10:27:26+07:00
Hasilnya x = 20 , y= 15 , z= 90
jadi x + y + z = 20 + 15 + 90 = 125

dapet 20 15 ama 90 darimana
# 120+3x = 180 --> x = 20
# 150+2y = 180 --> y = 15
# 3x+z+2y = 180 --> z = 90
2014-05-02T13:13:59+07:00