Jawabanmu

2014-06-06T20:42:31+07:00
3x - 1 < x + 3
3x - 1 + 1 < x + 3 +1
3x < x + 4
3x + ( - x ) < x  + ( - x ) + 4
2x < 4
2x / 2 < 4 / 2
x < 2
2014-06-06T21:20:29+07:00
2z + 3   ≥ -3z + 38
2z + 3z ≥  38 -3
5z        ≥ 35
z          ≥ 35/5
z          ≥ 7