Could you please provide the equation and the rest of the question?
<> greater than and less than

greater than or equal to and lesser than or equal to
= Is equal to
Don't forget to mark my anwer brainliest if I helped!

so.... since the number after .81 is 1, it doesn't really round up to .82, so is just that, 15.81.
You would add 4y to both sides of the equation which would leave you with
4y - 3 = 8x
then you would divide the entire equation by 4 leaving you with
y - 3/4 = 2x
then you would add 3/4 to both sides of the equation leaving you with
y = 2x + 3/4
This one could be 8/10, or 4/5 simplified