Solution - Linear equations with one unknown

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  3 • (x + 4)  = 0 

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  :    x+4 = 0 

 Subtract  4  from both sides of the equation : 
                      x = -4

One solution was found :