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 :

                     9^3*r-(28)=0 

Step by step solution :

Step  1  :

 1.1     9 = 32

(9)³ = (3²)³ = 3⁶

Equation at the end of step  1  :

  (36 • r) -  28  = 0 

Step  2  :

Equation at the end of step  2  :

  729r - 28  = 0 

Step  3  :

Solving a Single Variable Equation :

 3.1      Solve  :    729r-28 = 0 

 Add  28  to both sides of the equation : 
                      729r = 28
Divide both sides of the equation by 729:
                     r = 28/729 = 0.038

One solution was found :