10a+10 > 9a+22


10a+10 > 9a+22
   -10     -10   Subtract 10 from both sides:

10a    > 9a+12



10a+10 > 9a+22
   -10     -10
10a    > 9a+12
-9a     -9a      Subtract 9a from both sides
  a    >    12

For set builder notation, put "{a |" before the inequality
and a close bracket "}" after it:

{a | a > 12}

Some people use a colon instead of a slash, like this:

{a : a > 12}

Edwin