Answer :
5a - 2 < 18
Add 2 on both sides:
5a - 2 + 2 < 18 + 2
5a - 0 < 20
5a < 20
Divide both sides by 5:
5a/5 < 20/5
a < 4
Add 2 on both sides:
5a - 2 + 2 < 18 + 2
5a - 0 < 20
5a < 20
Divide both sides by 5:
5a/5 < 20/5
a < 4