How do you solve the inequality #9 > -3 (x - 1) ≥ -12#?
Divide throughout by 3 (does not change the signs)
Subtract 1 throughout
Swap sides and change the negatives to positives. Keep the inequality the same way round.
Same thing as: add 5 to both sides and add
Same thing as: multiply both sides by (-1) and turn the inequality sign the other way round.
Swap sides and change the signs but keep the inequality the same way round.