Answer:
x > 7
Step-by-step explanation:
Group the common factors, which are 3x and -6x, so it looks like:
3x - 6x + 12 < -9
-3x + 12 < -9
Subtract 12 from both sides:
-3x < -21
Divide everything by -3 to get your answer. Don't forget when dividing by a negative number, you have to flip the sign:
x > 7
