Respuesta :

Answer:

A. one solution

Step-by-step explanation:

solve for X and the only possible answer would be 4 , so A

devishri1977

Answer:

One solution

Step-by-step explanation:

3x+ 9 = 21

        3x = 21- 9

       3x = 12

         x = 12/3

x = 4

So, one solution

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