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

Toán Lớp 7: |x-2/3|+1/3=2/5 nho moi ng nhe ^-^ ^-^

Toán Lớp 7: |x-2/3|+1/3=2/5
nho moi ng nhe ^-^ ^-^

Comments ( 2 )

  1. |x-2/3|+1/3=2/5
    |x-2/3|=1/15
    TH1
    x-2/3=1/15
    x=1/15+2/3
    x=11/15
    TH2
    x-2/3=-1/15
    x=-1/15+2/3
    x=3/5
     Vậy x=11/15 và x=3/5

  2.  
    Lời giải và giải thích chi tiết + Giải đáp:
    | x – $\dfrac{2}{3}$ | + $\dfrac{1}{3}$ = $\dfrac{2}{5}$
    | x – $\dfrac{2}{3}$ |                            = $\dfrac{2}{5}$ – $\dfrac{1}{3}$
    | x – $\dfrac{2}{3}$ |                            = $\dfrac{6}{15}$ – $\dfrac{5}{15}$
    | x – $\dfrac{2}{3}$ |                            = $\dfrac{1}{15}$
    TH1 : x – $\dfrac{2}{3}$ = $\dfrac{1}{15}$       
    x        = $\dfrac{1}{15}$ + $\dfrac{2}{3}$
    x        = $\dfrac{1}{15}$ + $\dfrac{10}{15}$
    x        = $\dfrac{11}{15}$
    TH2 : x – $\dfrac{2}{3}$ = $\dfrac{-1}{15}$
    x        = $\dfrac{-1}{15}$ + $\dfrac{2}{3}$
    x        = $\dfrac{-1}{15}$ + $\dfrac{10}{15}$
    x        = $\dfrac{3}{5}$
     

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

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