Consider the Equation Mat at right.  

1. Write the original equation represented.

   Hint (a):

   Count the number of $x$-tiles and unit tiles on each side of the equation, then turn that into an equation.

2. Simplify the tiles on the mat as much as possible. What value of $x$ will make the two expressions equal?

   Hint (b):

   Remove matching sets of tiles from each side.

   More Help (b):

   Now you are left with $3$ $x$-tiles on the left and $9$ unit tiles on the right. Divide each side by $3$ to find the value of $x$.

   Answer (b):

   $x=3$