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2*x+2/y = 4*w+2 // - 4*w+2
2*x-(4*w)+2/y-2 = 0
2*x-4*w+2/y-2 = 0
2*x-4*w+2*y^-1-2 = 0 // - 2*y^-1-4*w-2
2*x = -(2*y^-1-4*w-2) // : 2
x = (-(2*y^-1-4*w-2))/2
x = (2-(-4*w)-(2*y^-1))/2
x = (2-(-4*w)-(2*y^-1))/2
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