Jawabanmu

2014-04-18T20:52:06+07:00
74=2 (2x+5+x+2) | 37=3x+7 | 30=3x | x=10
2014-04-18T20:54:59+07:00
4x +10 + 2x +4= 74 """ 6x= 60 """ x= 60/6= 10