Respuesta :

Answer:

x=-4

Step-by-step explanation:

x+13=9

The oppisite of +13 is -13. -13 to both sides to balance the equation out

x+13-13=9-13

x+0=-4

x=-4

Plug -4 back into the equation  for x to check the answer.

-4+13=9

The final answer is x=-4

The answer is X=-4.
Hope I helped