Question

5a - 2 < 18 a<____ Fill in the blank.

Answer 1

5A - 2 < 18
+2 +2
5A < 20
5A < 5A
A = 4

At least I think that's what you do.

Answer 2

5a - 2 < 18

Add both sides by 2, 
5a -2 + 2 < 18 + 2
5a < 20

Now, divide both sides from 5, 
5a/5 < 20/5
a < 4

In short, Your Answer would be: a < 4

Hope this helps!