Question

How to solve for y -2x(x+3y)=18

Answer 1

I’m not sure if you are solving for y or x but if you are solving for y it’s
y=(2(9+x^2))/(1-6x)
or if your solving for x it is
x= (-3y+ sqr(9y^2+2y-36)) / (2)

Answer 2

Answer:

y = 2(9+x2)

     ------------

       1−6x

         

x=−3y+√9y2+2y−36

      ------------------------

                 2