The part of your brain that controls muscle coordination and posture is the

The part of your brain that controls muscle coordination and posture is the cerebellum. This portion also maintains posture, balance, and internal equilibrium. c:

It really doesn't matter for any of the questions that you've listed.

Make them both to where they have the denominator of 18that makes 3/2 equal 27/18 and 1/9 equal 2/18so now you have  27/18x+5=2/18subtract 5 from the other sideso now you have 27/18x+2/18-5then subtract 2/18 from 27/18 to get 25/18x=-5then divide 25/18 by -5 and your answer will be  -5/18