Question 253126
Is there a shortage of capital letters and punctuation in your town?
Complex numbers involve i.
i=square root of -1
Since this is not an equation, I don't know what you are trying to do.

If it were 
8/10-x/2=10 for example
I would multiply both sides by ten to get rid of the denominator.
8-5x=100 would be the result
5x=92 then I would subtract 8 from both sides
Now divide by 5.
x=92/5
x=18.4

Otherwise there is not much you can do with 
8/10-x/2
You can reduce the fraction 8/10 to 4/5 or to a decimal .8
And you end up with
4/5-x/2
or
.8-x/2
and that is it.