You can put this solution on YOUR website! x/(x^2-1) - (x+3)/(x^2-x) = -3/(x^2+x)
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Multiply thru by x(x-1)(x+1) to get:
x^2 - (x+3)(x+1) = -3(x-1)
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x^2 - [x^2+4x+3] = -3x+3
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x^2 - x^2 -4x - 3 = -3x+3
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x = -6
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Cheers,
Stan H.