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(x/2)*(4*x-(3*y)) = 0
(x/2)*(4*x-3*y) = 0
1/2*x*(4*x-3*y) = 0
( 1/2*x )
1/2*x = 0 // : 1/2
x = 0
( 4*x-3*y )
4*x-3*y = 0 // + -3*y
4*x = -(-3*y) // : 4
x = (-(-3*y))/4
x = (3*y)/4
x in { 0, (3*y)/4 }
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