Answer:
y=9
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