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

Toán Lớp 7: ($\frac{x}{3}$ -1)$^{2}$ =$\frac{4}{9}$

Toán Lớp 7: ($\frac{x}{3}$ -1)$^{2}$ =$\frac{4}{9}$

Comments ( 2 )

  1. (x/3-1)^2=4/9
    (x/3-1)^2=(2/3)^2
    x/3-1=2/3
    x/3=2/3+1
    x/3=5/3
    ->x=5
    Vậy x=5

  2. Giải đáp+Lời giải và giải thích chi tiết:
    ($\frac{x}{3}$-1)$^{2}$ = $\frac{4}{9}$
    => ($\frac{x}{3}$-1)$^{2}$ = ($\frac{2}{3}$)$^{2}$
    => $\frac{x}{3}$-1=$\frac{2}{3}$
    => $\frac{x}{3}$= $\frac{2}{3}$+1
    => $\frac{x}{3}$=$\frac{5}{3}$
    => x=5
    Vậy x=5

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

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