Question

Tìm x biết

3/x-5=-4/x+2

x/-2=-8/x

Answer 1

a) \(\dfrac{3}{x}-5=-\dfrac{4}{x}+2\)

\(\dfrac{3}{x}+\dfrac{4}{x}=7\)

\(\dfrac{7}{x}=7\Rightarrow x=1\)

b) \(\dfrac{x}{-2}=\dfrac{-8}{x}\)

\(\Leftrightarrow x^2=16\)

\(\Leftrightarrow x=4\) hoặc \(x=-4\)

Answer 2

Ta có : \(\dfrac{3}{x}+\dfrac{4}{x}=2+5=7\)

x =1