solve x + 1 by X - 1 + X - 2 by X + 2 is equal to 3
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(x+1/x-1)+(x-2/x+2)=3
(x+2)(x+1)+(x-1)+(x-2)/(x^2+2x-x-2)=3
(x^2+x+2x+2)+(x^2-2x-x+2)=3(x^2+x-2)
(x^2+3x+2)+(x^2-3x+2)=3x^2+3x-6
2x^2+4=3x^2+3x-6
x^2+3x-10=0
x^2-2x+5x-10=0
x(x-2)+5(x-2)=0
(x+5)(x-2)=0
x=-5,x=2
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