lm giúp mih câu 1,3,5,7,,9,10,11 với ạ

Đáp án:+Giải thích các bước giải:

 1)

$\dfrac{1}{2}$ - ( x + $\dfrac{1}{3}$ ) = $\dfrac{5}{6}$

    $\dfrac{1}{2}$ - x - $\dfrac{1}{3}$ = $\dfrac{5}{6}$

    $\dfrac{1}{6}$ - x = $\dfrac{5}{6}$

    x = $\dfrac{1}{6}$ - $\dfrac{5}{6}$

    x = $\dfrac{-2}{3}$

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3)  

$\dfrac{5}{6}$ - ( x + $\dfrac{1}{3}$ ) = $\dfrac{1}{6}$

    $\dfrac{5}{6}$ - x - $\dfrac{1}{3}$ = $\dfrac{1}{6}$

   $\dfrac{3}{6}$ - x = $\dfrac{1}{6}$

   x = $\dfrac{3}{6}$ - $\dfrac{1}{6}$

   x = $\dfrac{1}{3}$

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5)

$\dfrac{17}{6}$ - ( x - $\dfrac{7}{6}$ ) = $\dfrac{7}{4}$

  $\dfrac{17}{6}$ - x + $\dfrac{7}{6}$ = $\dfrac{7}{4}$

   $\dfrac{4}{1}$ - x = $\dfrac{7}{4}$

   x = $\dfrac{4}{1}$ - $\dfrac{7}{4}$

   x = $\dfrac{9}{4}$

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7 )

$\dfrac{3}{4}$ - ( x - $\dfrac{2}{3}$ ) = $\dfrac{5}{6}$

$\dfrac{3}{4}$ - x + $\dfrac{2}{3}$ = $\dfrac{5}{6}$

  $\dfrac{17}{12}$ - x = $\dfrac{5}{6}$

  x = $\dfrac{17}{12}$ - $\dfrac{5}{6}$

   x = $\dfrac{7}{12}$

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9 )

 $\dfrac{11}{12}$ - ( $\dfrac{2}{5}$ + x ) = $\dfrac{2}{3}$

 $\dfrac{11}{12}$ - $\dfrac{2}{5}$ - x = $\dfrac{2}{3}$

  $\dfrac{31}{60}$ - x = $\dfrac{2}{3}$

   x = $\dfrac{31}{60}$ - $\dfrac{2}{3}$

  x = $\dfrac{-3}{20}$

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10 )

 $\dfrac{7}{12}$ - ( $\dfrac{3}{8}$ - x ) = $\dfrac{-5}{6}$

$\dfrac{7}{12}$ - $\dfrac{3}{8}$ + x = $\dfrac{-5}{6}$

$\dfrac{5}{24}$ + x = $\dfrac{-5}{6}$

x = $\dfrac{-5}{6}$ - $\dfrac{5}{24}$

x = $\dfrac{-5}{8}$

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11 ) 

$\dfrac{5}{12}$ - ( $\dfrac{3}{8}$ - x ) = - $\dfrac{5}{6}$

$\dfrac{5}{12}$ - $\dfrac{3}{8}$ + x = $\dfrac{-5}{6}$

$\dfrac{1}{24}$ + x = $\dfrac{-5}{6}$

x = $\dfrac{-5}{6}$ - $\dfrac{1}{24}$

x = $\dfrac{-19}{24}$

                                                                   ⋆ ˚｡⋆୨Ӏҽҍąօղℊօç884୧⋆ ˚｡⋆

                                                           . ݁      ݁ςɧúς.ςậμ.ɧọς.τốτ.ηɧé.!!!!.<333˖ . ݁