That's pretty bad typesetting, let's assume it reads
[tex] 7 < \dfrac t 3+ 9[/tex]
Subtracting 9 from both sides,
[tex]-2 < \dfrac t 3[/tex]
Multiplying both sides by three doesn't flip the inequality because it's positive:
[tex]-6 < t[/tex]
We can write this
[tex]t > -6[/tex]
Answer: t > -6
