solve equations by inverse operations:
7-3n = -32
9 + x/3 = 14
5= 3 + x/9
7-3n = -32
7 - 7 - 3n = -32 - 7
-3n = -39
n = 13
Study this site.
http://www.sparknotes.com/math/algebra1/expressionsandequations/section4.rhtml
If you post your solutions to the other two problems, I'll be glad to check them.