solve the equation (X - 3 divided by X - 1) close - 4 (x minus 1 divided by x minus 3) close equals to 3 x
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(X-3/X-1)-4(X-1/X-3)=3x
=(X-3)^2-4(X-1)^2/(X-1)(X-3)=3x
=X^2+9-6x-4X^2-4+8x/X^2-4x+3=3x
= -3x^2+2x+5=3x(x^2-4x+3)
= -3x^2+2x+5=3x^3-12x^2+9x
=3x^3-9x^2+7x-5=0
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