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x in (-oo:+oo)
x*((-3*x-(10*y))/2)+x*((8*x-(8*y))/2) = 0
x*((-3*x-10*y)/2)+x*((8*x-8*y)/2) = 0
(x*(-3*x-10*y))/2+(x*(8*x-8*y))/2 = 0
x*(-3*x-10*y)+x*(8*x-8*y) = 0
5*x^2-18*x*y = 0
5*x^2-18*x*y = 0
x*(5*x-18*y) = 0
5*x-18*y = 0 // + -18*y
5*x = -(-18*y) // : 5
x = (-(-18*y))/5
x = (18*y)/5
x*(x-18/5*y) = 0
(x*(x-18/5*y))/2 = 0
(x*(x-18/5*y))/2 = 0 // * 2
x*(x-18/5*y) = 0
( x-18/5*y )
x-18/5*y = 0 // + -18/5*y
x = -(-18/5*y)
x = 18/5*y
( x )
x = 0
x in { 18/5*y, 0 }
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