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((4*x)/3)*y = (A/6)*y^2 // - (A/6)*y^2
((4*x)/3)*y-((A/6)*y^2) = 0
4/3*x*y-1/6*A*y^2 = 0 // + -1/6*A*y^2
4/3*x*y = -(-1/6*A*y^2) // : 4/3*y
x = (-(-1/6*A*y^2))/(4/3*y)
x = 1/8*A*y
x = 1/8*A*y
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