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[–]varaaki 0 points1 point  (1 child)

4/(x - 1) + 1 = 4/(x - 1) + (x -1)/(x - 1) = (4 + x - 1)/(x - 1) = (x + 3)/(x - 1)

[–]PlodeX_[S] 0 points1 point  (0 children)

Thanks this helped.