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 :

                18*r-10*r-20*r+2*r+9*r-(18)=0 

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   -r - 18  =   -1 • (r + 18) 

Equation at the end of step  1  :

Step  2  :

Solving a Single Variable Equation :

 2.1      Solve  :    -r-18 = 0 

 Add  18  to both sides of the equation : 
                      -r = 18
Multiply both sides of the equation by (-1) :  r = -18

One solution was found :