Respuesta :

Answer:

x=7

Step-by-step explanation:

x+5=3x-9

   +9    +9

x+14=3x

-x       -x

14=2x (divide by 2)

   2

7=x

Check answer:

7+5= 12 (substitue x)

3(7)-9= 12 (substitute x)

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