Question

Answer 1

ĐKXĐ; ...

Thế pt dưới lên pt trên:

\(\dfrac{24}{5\left(y-4\right)}+\dfrac{24}{5y}=1\)

\(\Leftrightarrow\dfrac{24}{y-4}+\dfrac{24}{y}=5\)

\(\Rightarrow24y+24\left(y-4\right)=5y\left(y-4\right)\)

\(\Leftrightarrow5y^2-68y+96=0\Rightarrow\left[{}\begin{matrix}y=12\Rightarrow x=8\\y=\dfrac{8}{5}\Rightarrow x=-\dfrac{12}{5}\end{matrix}\right.\)

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