Question

4
---- -4
5r-1
divided by
4
------+ 4
5r-1

Answer 1

determine the LCD for everything is 5r -1 . then first thing is multiply top and bottom with 5r -1

(4/(5r-1) -4) (5r-1)
-----------------
(4/(5r-1) +4)(5r-1)

4- 4(5r-1)
--------
4 + 4(5r-1)

4- 20r +4
---------
4 +20r -4

8-20r
------
20r

4(2-5r)
------
20r

2-5r
----
5r

Answer 2

4 4-4(5r-1)
--- -4 --------
5r-1 5r-1 4(1-5r+1) 5r-1 4(2-5r) 2-5r
------- = --------- = --------- x --------- = -------- = ------
4 4+4(5r-1) 5r-1 4(1+5r-1) 20r 5r
---- +4 ---------
5r-1 5r-1