Answer
$\dfrac{3x-2}{x-3}, x \ne3$
Work Step by Step
Since the denominators are the same, we have
$$
\frac{x+1}{x-3}+\frac{2x-3}{x-3}=\frac{x+1+2x-3}{x-3}=\frac{3x-2}{x-3}
$$
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