Solution - Linear equations with one unknown

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                     9*(z-3)-(-9)=0 

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  9 • (z - 3) -  -9  = 0 

Step  2  :

Pulling out like terms :

 2.1      Pull out     9 

Note that  -9 =(-1)• 9 
After pulling out, we are left with :
      9 • ( (-1)  *  (z-3) +( (-1) ))

Equation at the end of step  2  :

  9 • (2 - z)  = 0 

Step  3  :

Equations which are never true :

 3.1      Solve :    9   =  0

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

Solving a Single Variable Equation :

 3.2      Solve  :    -z+2 = 0 

 Subtract  2  from both sides of the equation : 
                      -z = -2
Multiply both sides of the equation by (-1) :  z = 2

One solution was found :