Patrick B. answered 06/08/20
Math and computer tutor/teacher
Use parenthesis to mark what exactly is the denominator !!!
AS WRITTEN, the function is really 5x + (3/4)x - 1 = (23/4)x- 1
which is a linear function whose domain is all reals...
That is how many computer learning systems shall render the
function in the browser!
I suspect you meant (5x+6)/(8x-1)
In that case, the domain is ALL REALS EXCEPT 1/8
(-infinity, 1/8) U ( 1/8, infinity)