Solve the inequality. explain all steps and identify the properties used. 3a-4< _ 5

Well, you want to solve for a. You first add the 4 to both sides. 
3a-4<5
3a<9
Then you want to get a by itself so you divide both sides by 3. Since the 3 is positive you don't have to worry about switching the sign. It stays this way <

After you divided both sides by 3 you get a<3