Question 77292
You need to first find a common denominator;

(6/y-4)-(1/y+1)

common denominator is  (y-4)(y+1)

multiply the 6 by (y+1), then multiply the 1 by (y-4)

this gives:

6y +6 - y + 4

combine like terms to get the answer:

5y + 10

Hope this helps!!!