Question

How do you multiply `(r-4)/(5r)=(1/(5r)) + (1)`?

Answer 1

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

`(r-4)/(5r) -1/(5r) = 1 xx (5r)/(5r)`

`(r-4)/(5r) -1/(5r) = (5r)/(5r)`

`(r-4 -1)/cancel(5r) = (5r)/cancel(5r)`

`r-5 =5r`
`-5 =4r`

`r = -5/4`