Solution - Linear equations with one unknown

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   15x + 20  =   5 • (3x + 4) 

Equation at the end of step  1  :

Step  2  :

Equations which are never true :

 2.1      Solve :    5   =  0

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

Solving a Single Variable Equation :

 2.2      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 :