4/67.x-2/3=3/4 , 4/5+5/7:x=1/6 tim x

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Đáp án:`+`Giải thích các bước giải:

$a) => x-\dfrac{2}{3}=\dfrac{3}{4}:\dfrac{4}{67}=\dfrac{3}{4}.\dfrac{67}{4}=\dfrac{201}{16}$

$=>x=\dfrac{201}{16}+\dfrac{2}{3}=\dfrac{603}{48}+\dfrac{32}{48}=\dfrac{635}{48}$

Vậy `x=635/48`

$b)=>\dfrac{5}{7}:x=\dfrac{1}{6}-\dfrac{4}{5}=\dfrac{5}{30}-\dfrac{24}{30}=\dfrac{-19}{30}$

$=>x=\dfrac{5}{7}:\dfrac{-19}{30}=\dfrac{5}{7}.\dfrac{30}{-19}=\dfrac{-150}{133}$/

Vậy `x=-150/133`

$ a) ⇒ x-\dfrac{2}{3}=\dfrac{3}{4}:\dfrac{4}{67}=\dfrac{3}{4}.\dfrac{67}{4}=\dfrac{201}{16} $

$ ⇒x=\dfrac{201}{16}+\dfrac{2}{3}=\dfrac{603}{48}+\dfrac{32}{48}=\dfrac{635}{48} $

$ b) ⇒\dfrac{5}{7}:x=\dfrac{1}{6}-\dfrac{4}{5}=\dfrac{5}{30}-\dfrac{24}{30}=\dfrac{-19}{30} $

$ ⇒x=\dfrac{5}{7}:\dfrac{-19}{30}=\dfrac{5}{7}.\dfrac{30}{-19}=\dfrac{-150}{133} $

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