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 :

                     (8*z+4)/(-4)-(-9)=0 

Step by step solution :

Step  1  :

            8z + 4
 Simplify   ——————
              -4  

Step  2  :

Pulling out like terms :

 2.1     Pull out like factors :

   8z + 4  =   4 • (2z + 1) 

Equation at the end of step  2  :

  (-2z - 1) -  -9  = 0 

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   8 - 2z  =   -2 • (z - 4) 

Equation at the end of step  4  :

  -2 • (z - 4)  = 0 

Step  5  :

Equations which are never true :

 5.1      Solve :    -2   =  0

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

Solving a Single Variable Equation :

 5.2      Solve  :    z-4 = 0 

 Add  4  to both sides of the equation : 
                      z = 4

One solution was found :