Jawabanmu

2014-02-19T21:55:55+07:00
3x + 5x < 19 + 7
8x < 26
  x < 26/8
  x < 134
2014-02-19T22:21:00+07:00
3x -7 < 19 -5x
⇔ 3x + 5x < 19 + 7
⇔ 8x < 26
⇔ x = 26/8
⇔ x = 3 1/4