Solution - Linear equations with one unknown

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   12a - 27  =   3 • (4a - 9) 

Equation at the end of step  1  :

Step  2  :

Equations which are never true :

 2.1      Solve :    3   =  0

This equation has no solution.
A a non-zero constant never equals zero.

Solving a Single Variable Equation :

 2.2      Solve  :    4a-9 = 0 

 Add  9  to both sides of the equation : 
                      4a = 9
Divide both sides of the equation by 4:
                     a = 9/4 = 2.250

One solution was found :