The equation is . \ \

According to division property of equality:

For any number a, b and c, If a = b then 

                    (Divide each side by 9)

                        (Cancel common terms)

a = 5                                      (Divide: )

Verify:

To check the solution, substitute a = 5 in original equation.    

45 = 45                         (Multiply: )

Compare the values, the equation is true. The solution is a = 5.

The value of a = 5.