Victor wants to play “Guess My Number.” Use the clues below to figure out his number. Each part is a new game.  

1. “When you double my number and subtract $\mathit{9}$, you get my original number. What is my number?”

   Step 1 (a):

   Write out an expression to represent the statement.

   Step 2 (a):

   $2x−9=x$
   Solve for $x$.

   Answer (a):

   $x=9$

2. “When you double my number and add $\mathit{5}$, you get $\mathit{17}$. What is my number?”

   Step 1 (b):

   $2x+5=17$
   Solve for $x$.