\(\dfrac{1}{x+3}+1=\dfrac{2x-3}{x+3}\left(ĐKXĐ:x\ne-3\right)\)
\(\Leftrightarrow x+3+x+3=2x-3\)
\(\Leftrightarrow x+x-2x=-3-3-3\)
\(\Leftrightarrow0=-9\left(vô\cdot lí\right)\)
Vậy \(S=\varnothing\)
\(\dfrac{1}{x+3}+1=\dfrac{2x-3}{x+3}\) ( DKXD \(x\text{ ≠}-3\))
\(\Leftrightarrow\) \(\dfrac{1}{x+3}+\dfrac{x+3}{x+3}=\dfrac{2x-3}{x+3}\)
\(\Leftrightarrow\) \(1+x+3=2x-3\)
\(\Leftrightarrow\) \(x-2x=-3-4\)
\(\Leftrightarrow-x=-7\)
\(\Leftrightarrow x=7\)
\(\Rightarrow\) Phương trình có tập nghiệm \(S=\) {\(7\)}