465+18 = 483
The fraction was just to throw you off, it's not too hard if you look carefully since you get a whole number from it
Answer:
1:2 - one dog to two cats.
I'm pretty sure it's 4x+6x²-9
Switch sides
4/5 (x+3)=y+6
Multiply both sides by 5
5*4/5 (x+3) = 5y+5*6
Simplify
4(x+3) = 57+30
Divide both sides by 4
4(x+3)/4 = 5y/4+ 30/4
Simplify
x+3 = 5y+30/4
Subtract 3 from both sides
x+3 - 3 = 5y+30/4 - 3
Simplify
x=5y+30/4 - 3