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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: a 5x -4 = 96 b 1\2-x=3\4 c x+4\5=6\7

Toán Lớp 7: a 5x -4 = 96 b 1\2-x=3\4 c x+4\5=6\7

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    a, 5x – 4 = 96 ⇔ 5x = 100 ⇔ x = 20
    b, $\dfrac{1}{2}$ – x = $\dfrac{3}{4}$ ⇔ x = $\dfrac{1}{2}$ – $\dfrac{3}{4}$ ⇔ x = $\dfrac{-1}{4}$
    c, x + $\dfrac{4}{5}$ = $\dfrac{6}{7}$ ⇔ x = $\dfrac{6}{7}$ – $\dfrac{4}{5}$ ⇔ x = $\dfrac{2}{35}$
      

  2. a,
    $5x-4=96$
    $⇒5x=100$
    $⇒x=20$
    Vậy $x=20$
    b, 
    $\dfrac{1}{2}-x=\dfrac{3}{4}$
    $⇒x=\dfrac{-1}{4}$
    Vậy $x=\dfrac{-1}{4}$
    c,
    $x+\dfrac{4}{5}=\dfrac{6}{7}$
    $⇒x=\dfrac{2}{35}$
    Vậy $x=\dfrac{2}{35}$
     

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222-9+11+12:2*14+14 = ? ( )