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

Toán Lớp 5: tìm x 2/5+x =1 x – 7/4=25/16 x . 50/7=25/14

Toán Lớp 5: tìm x
2/5+x =1
x – 7/4=25/16
x . 50/7=25/14

Comments ( 2 )

  1. Giải đáp:Lời giải và giải thích chi tiết:
    $\text{#Nhím }$
    $\dfrac{2}{5}+x =1$
    $x+\dfrac{2}{5}=1$
    $x=1-\dfrac{2}{5}$
    $x=\dfrac{5}{5}-$ $\dfrac{2}{5}$
    $x=\dfrac{3}{5}$
    $——————–^{}$
    $x-\dfrac{7}{4}=$ $\dfrac{25}{16}$
    $x=\dfrac{25}{16}+$ $\dfrac{7}{4}$
    $x=\dfrac{25}{16}+$ $\dfrac{28}{16}$
    $x=\dfrac{53}{16}$
    $——————–^{}$
    $x.\dfrac{50}{7}=$ $\dfrac{25}{14}$
    $x=\dfrac{25}{14}:$ $\dfrac{50}{7}$
    $x=\dfrac{25}{14}.$ $\dfrac{7}{50}$
    $x=\dfrac{1}{4}$
    $\text{#StudyWell}$
     

  2. Lời giải chi tiết:
    a) 2/5+x=1
    x=1-2/5
    x=5/5-2/5
    x=3/5
    Vậy x=2/5
    b) x-7/4=25/16
    x=25/16+7/4
    x=25/16+28/16
    x=53/16
    Vậy x=53/16
    c) xxx50/7=25/14
    x=25/14:50/7
    x=25/14xx7/50
    x=1/4
    Vậy x=1/4

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