5/x-1 + 3x/x+1 = 3

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First solve the left side:5/x-1 + 3x/x+1 = 3Make the same denominator:5(x+1)/(x+1)(x-1) + 3x(x-1)/(x+1)(x-1) = 3You have to multiply both numerator and denominator by the same thing. Now, simplify and add:(5x+1)/(x^2-1) + (3x^2)/(x^2-1) = 3Combine like terms, (3x^2+2x+5)/(x^2-1) = 3/1Now, Use Cross Multiply: 3x^2+2x+5 = 3x^2 +3-3x^2      -5   -3x^2  -5           2x = -8             x=-4Hope this helped.