1
[tex]7x - 9 < 6x + 9 \\ 7x - 6x < 9 + 9 \\ x < 18[/tex]
4
[tex]5x + 3 > 7x - 6 \\ 5x - 7x > - 6 - 3 \\ - 2 x > - 9 \\ \frac{ - 2x}{ - 2} > \frac{ - 9}{ - 2} \\ x > 4.5[/tex]
7
[tex]3x - 5 < 4 \\ 3x < 4 + 5 \\ 3x < 9 \\ \frac{3x}{3} < \frac{9}{3} \\ x < 3[/tex]
