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

Toán Lớp 7: 0,12/3=0,21/x tìm x????????????????????????????‍????????☠️????????

Toán Lớp 7: 0,12/3=0,21/x tìm x????????????????????????????‍????????☠️????????

Comments ( 2 )

  1. (0,12)/3=(0,21) / x
    ⇔0,12. x=3. 0,21
    ⇔0,12x=0,63
    ⇔x=5,25

  2. $\frac{0,12}{3}$ = $\frac{0,21}{x}$
    ⇔ 0,12 . x= 3 . 0,21
    ⇔ 0,12 . x= 0,63
    ⇔x = $\frac{0,63}{0,12}$ 
    ⇔x=$\frac{21}{4}$(= 5,25)
                       Vậy x=$\frac{21}{4}$(= 5,25)
    Chúc bn học tốt^^
    xin tlhn ạ!!

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

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