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

Toán Lớp 7: d) `x/6` = `12/4` e) `8/x` = `32/4` f) `x/-3` = `-12/-9`

Toán Lớp 7: d) x/6 = 12/4
e) 8/x = 32/4
f) x/-3 = -12/-9

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
     d, x/6 = 12/4
    ⇒ x : 6 = 3
        x       = 3 × 6
        x       = 18
    e, 8/x = 32/4
    ⇒ 8 : x = 8
             x = 8 : 8
             x = 1
    f, x/(-3) = (-12)/(-9)
    ⇒ x/(-3) = (-4)/(-3)
    ⇒ x = -4
          

  2. $\text{d) $\dfrac{x}{6}$ = $\dfrac{12}{4}$ }$
    $\text{⇒ x.4 = 6.12}$
    $\text{x.4 = 72}$
    $\text{x = 18}$
    $\text{e) $\dfrac{8}{x}$ = $\dfrac{32}{4}$ Đkxđ: x $\neq$ 0}$
    $\text{⇒ 32.x = 8.4}$
    $\text{32.x = 32}$
    $\text{x = 1}$
    $\text{f) $\dfrac{x}{-3}$ = -$\dfrac{12}{-9}$ }$
    $\text{⇒ -9.x = (-12).(-3)}$
    $\text{-9.x = 36}$
    $\text{x = -4}$
    $\textit{Ha1zzz}$
     

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