You solve it the same way you'd solve a regular equation with a = sign.
The main difference is if you divide or multiply by a negative number, you need to switch the inequality sign around.
This site might help. It goes through each step of the process if you're having trouble. http://webmath.com/solverineq.html
Here's how I would do it. I haven't done this stuff in 5 years so hopefully it's right. XD
Step 1. Expand the brackets
Step 2. Simplify
Step 3. We need all the n's on one side, so +n to each side.
Step 4. We need the regular numbers on the opposite side so +10 to each side.
Step 5. Simplify
Step 6. Divide both sides by -11 to get n by itself. (Since dividing by a negative number, switch the inequality sign to point the opposite way.)
Step 7. Simplify