For this case we must resolve the following inequality:
[tex]-3t + 7 \geq9[/tex]
Subtracting 7 from both sides of the inequality we have:
[tex]-3t \geq9-7\\-3t \geq2[/tex]
Dividing by 3 to both sides of the inequality we have:
[tex]-t \geq \frac {2} {3}[/tex]
We multiply by -1 on both sides, taking into account that the sense of inequality changes:
[tex]t \leq- \frac {2} {3}[/tex]
Thus, it is observed that to solve the inequality it is necessary to change the meaning of it.
ANswer:
False. It is necessary to change the sense of inequality
