Question

I don’t understand how to do the question

Answer 1

That's pretty bad typesetting, let's assume it reads

`7 < \frac t 3+ 9`

Subtracting 9 from both sides,

`-2 < \frac t 3`

Multiplying both sides by three doesn't flip the inequality because it's positive:

`-6 < t`

We can write this

`t > -6`

Answer: t > -6