Respuesta :

Answer:

k = 3 1/5

Step-by-step explanation:

We want to isolate k, or move all numbers to the other side.

1/2 (4 - k) = 2/5

(4 - k) = 2/5 * 2

-k = 4/5 - 4

k = 4 - 4/5

k = 3 1/5