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 :

                     3*(x-4)-(12*x)=0 

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  3 • (x - 4) -  12x  = 0 

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   -9x - 12  =   -3 • (3x + 4) 

Equation at the end of step  3  :

  -3 • (3x + 4)  = 0 

Step  4  :

Equations which are never true :

 4.1      Solve :    -3   =  0

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

Solving a Single Variable Equation :

 4.2      Solve  :    3x+4 = 0 

 Subtract  4  from both sides of the equation : 
                      3x = -4
Divide both sides of the equation by 3:
                     x = -4/3 = -1.333

One solution was found :