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 :

                     21-2*x-(8*x+5)=0 

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   16 - 10x  =   -2 • (5x - 8) 

Equation at the end of step  1  :

Step  2  :

Equations which are never true :

 2.1      Solve :    -2   =  0

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

Solving a Single Variable Equation :

 2.2      Solve  :    5x-8 = 0 

 Add  8  to both sides of the equation : 
                      5x = 8
Divide both sides of the equation by 5:
                     x = 8/5 = 1.600

One solution was found :