I don't mind solving the question, but I think that if you read this page once, you'll always be able to solve these and it will make your life a lot easier
See for yourself; http://www.mathsisfun.com/algebra/inequality-solving.html
This one is similar to this one that I just worked → -1/2(b)-3=>9......look at that answer and see if you can work through this one......you won't learn anything just by looking at our work.......