Respuesta :

The answer is -1
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Answer:

k = - 1

Step-by-step explanation:

13 = -4k + 9

-4k + 9 = 13

subtract 9 from both sides

-4k + 9 - 9 = 13 - 9

simplify

-4k = 4

k = 4 / -4

k = - 1