\(\dfrac{2}{x-5}=\dfrac{3}{x+1}\) (ĐK: \(x\ne-1;5\))
\(\Rightarrow2\left(x+1\right)=3\left(x-5\right)\)
\(\Leftrightarrow2x+2=3x-15\)
\(\Leftrightarrow2x-3x=-15-2\)
\(\Leftrightarrow-x=-17\)
\(\Leftrightarrow x=17\) (TMĐK)
\(\dfrac{2}{x-5}=\dfrac{3}{x+1}\text{ĐKXĐ}:x\ne5;-1\)
\(\Leftrightarrow\dfrac{2\left(x+1\right)}{\left(x-5\right)\left(x+1\right)}=\dfrac{3\left(x-5\right)}{\left(x-5\right)\left(x+1\right)}MTC:\left(x-5\right)\left(x+1\right)\)
\(\Rightarrow2x+2=3x-15\)
\(\Leftrightarrow2x+2-3x+15=0\)
\(\Leftrightarrow17-x=0\)
\(\Leftrightarrow x=17\)
\(\text{Vậy phương trình có tập nghiệm là }S=\left\{17\right\}\)
