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 :

                     180-(-3*(-4-7*x))=0 

Step by step solution :

Step  1  :

Step  2  :

Pulling out like terms :

 2.1     Pull out like factors :

   -4 - 7x  =   -1 • (7x + 4) 

Equation at the end of step  2  :

  180 -  (0 -  -3 • (7x + 4))  = 0 

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   168 - 21x  =   -21 • (x - 8) 

Equation at the end of step  4  :

  -21 • (x - 8)  = 0 

Step  5  :

Equations which are never true :

 5.1      Solve :    -21   =  0

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

Solving a Single Variable Equation :

 5.2      Solve  :    x-8 = 0 

 Add  8  to both sides of the equation : 
                      x = 8

One solution was found :