Respuesta :

You can add - 1/3. Hope it helps! If you could vote my answer as the brainiest, that would be awesome! :)
silfer08

Answer:

-1/3

Step-by-step explanation:

We need a c number that:

5/6x + cx = 1/2x

We clear the equation:

cx = 1/2x -5/6x

c = 1/2 -5/6

c= -2/6 = -1/3