Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): ".9" was replaced by "(9/10)".

Step  1  :

             9
 Simplify   ——
            10

Equation at the end of step  1  :

   9
  —— • (x - 99)
  10

Step  2  :

Final result :

  9 • (x - 99)
  ————————————
       10