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-(7+a)=0 

Step by step solution :

Step  1  :

Solving a Single Variable Equation :

 1.1      Solve  :    -a+2 = 0 

 Subtract  2  from both sides of the equation : 
                      -a = -2
Multiply both sides of the equation by (-1) :  a = 2

One solution was found :