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 :

                     d*m-(d)=0 

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   dm - d  =   d • (m - 1) 

Equation at the end of step  1  :

Step  2  :

Theory - Roots of a product :

 2.1    A product of several terms equals zero. 

 When a product of two or more terms equals zero, then at least one of the terms must be zero. 

 We shall now solve each term = 0 separately 

 In other words, we are going to solve as many equations as there are terms in the product 

 Any solution of term = 0 solves product = 0 as well.

Solving a Single Variable Equation :

 2.2      Solve  :    d = 0 

  Solution is  d = 0

Solving a Single Variable Equation :

 2.3      Solve  :    m-1 = 0 

 Add  1  to both sides of the equation : 
                      m = 1

Two solutions were found :

1.  m = 1
2.  d = 0