Respuesta :

Answer:    x = -3

Step-by-step explanation:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    x-6-(-9)=0

                 

Solving a Single Variable Equation :

1.1      Solve  :    x+3 = 0  

Subtract  3  from both sides of the equation :  

                     x = -3

Answer: x = -3

Step-by-step explanation