Because the discriminant is less than zero, there are no real solutions in the equation.
First you subtract 3x because you are trying to get x alone so subtract 3x on both side so you would get 2y=-3x-4 and then divide the whole thing by 2 so you would get y=-3-4/2 and then you simplify and get y=-7/2 so y=-7/2 is your answer.
15, 20, 25 is the correct answer