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

Toán Lớp 7: / x-2/3 / – 5/9 = 0.(4) NHANH NHANH DÙM MIK Ạ TKS

Tháng Tám 11, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: / x-2/3 / – 5/9 = 0.(4)
NHANH NHANH DÙM MIK Ạ TKS

Comments ( 2 )

  1. thienthanh
    thienthanh
    11 Tháng Tám, 2022 at 8:37 sáng
    Reply
    l$x – \dfrac{2}{3}$l – $\dfrac{5}{9}$ = $0,(4)$
    l$x – \dfrac{2}{3}$l – $\dfrac{5}{9}$ = $\dfrac{4}{9}$
    l$x – \dfrac{2}{3}$l = $\dfrac{4}{9}$ + $\dfrac{5}{9}$
    l$x – \dfrac{2}{3}$l = $1$
    $x – \dfrac{2}{3}$ = $1$ $\text{hoặc}$ $x – \dfrac{2}{3}$ = -$1$
    $x$ = $\dfrac{5}{3}$ $\text{hoặc}$ $x = – \dfrac{1}{3}$

  2. maingoctruc
    maingoctruc
    11 Tháng Tám, 2022 at 8:37 sáng
    Reply
    |x – 2/3| – 5/9 = 0,(4)
    |x – 2/3| – 5/9 = 4/9
    |x – 2/3| = 4/9 + 5/9
    |x – 2/3| = 1
    => x – 2/3 = 1 hoặc x – 2/3 = -1
    => x = 5/3 hoặc x = -1/3
    Vậy x in {5/3; -1/3}
     

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

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