Tìm x biết rằng: (frac{1}{{150}} – x = frac{{ – 4}}{{25}})

Ta có

(begin{array}{l} frac{1}{{150}} – x = frac{{ – 4}}{{25}}\ Rightarrow – x = frac{{ – 4}}{{25}} – frac{1}{{150}}\ Rightarrow – x = frac{{ – 24}}{{150}} – frac{1}{{150}}\ Rightarrow – x = frac{{ – 25}}{{25}} = frac{{ – 1}}{6}\ Rightarrow x = frac{1}{6} end{array})