13 (y-4) - 3 (y-9) - 5 (y+4) = 0

y=9

Step-by-step explanation:

13 (y-4) - 3 (y-9) - 5 (y+4) = 0

1) Distribute 13 to y and - 4:

13y-52

2) Distribute - 3 to y and - 9:

13y-52-3y+27

3) Distribute - 5 to y and 4:

13y-52-3y+27-5y-20=0

4) Combine alike terms:

5y-45=0

5) Add 45 to both sides:

5y=45

6) Divide both sides by 5:

y=9