Solution - Linear equations with one unknown

Step by step solution :

Step  1  :

Pulling out like terms :

 1.1     Pull out like factors :

   -3a - 7  =   -1 • (3a + 7) 

Equation at the end of step  1  :

Step  2  :

Solving a Single Variable Equation :

 2.1      Solve  :    -3a-7 = 0 

 Add  7  to both sides of the equation : 
                      -3a = 7
Multiply both sides of the equation by (-1) :  3a = -7


Divide both sides of the equation by 3:
                     a = -7/3 = -2.333

One solution was found :