Which of the following is a form of active transport? a) sodium-potassium pump b) simple diffusion c)osmosis and why?

the answer is golgi apparatus

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)