Answer:
16
Explanation:
Subtract 6/x from both sides to get 2/x = -4.
Now, multiply both sides by -x/4 to get x = -1/2.
Since this is not an answer choice, you probably meant 6/(x-4)=8/x. Cross multiply to get 8x-32=6x, so x = 16.
Note: Please use order of operations, it can confuse some people if you do not!