-13 because 6 x 2 = 12 plus x = -13 x represents 1 btw
Answer:
I'm pretty sure it's the first and last one
ANSWER
(C) d=1
EXPLANATION
The given equation is

Factor the first fraction to get,

Multiply through by (d+2)(d-4)

Expand:




divide both sides by -2

Answer:
speed
Step-by-step explanation:
it's literally stated in the question