Solution - Linear equations with one unknown

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  5 • (n + 3) +  4n  = 0 

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   9n + 15  =   3 • (3n + 5) 

Equation at the end of step  3  :

  3 • (3n + 5)  = 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  :    3n+5 = 0 

 Subtract  5  from both sides of the equation : 
                      3n = -5
Divide both sides of the equation by 3:
                     n = -5/3 = -1.667

One solution was found :