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

Toán Lớp 6: 1/2 .x+3/5.(x+2)=3 giúp minh voi

Toán Lớp 6: 1/2 .x+3/5.(x+2)=3
giúp minh voi

Comments ( 2 )

  1. Giải đáp:
     $\dfrac{1}{2}$ x+ $\dfrac{3}{5}$ (x+2)=3
    <=>$\dfrac{1}{2}$x +$\dfrac{3}{5}$x + $\dfrac{6}{5}$ =3
    <=>$\dfrac{11}{10}$x+$\dfrac{6}{5}$ =3
    <=>$\dfrac{11}{10}$x =9/5
    <=>x                           =9/5:11/10
    <=>x                           =18/11
                      Vậy x= 18/11
    Lời giải và giải thích chi tiết:
     

  2. $\text{ $\dfrac{1}{2}$. x + $\dfrac{3}{5}$. ( x + 2 ) = 3 }$
    $\Rightarrow$ $\text{ $\dfrac{1}{2}$. x + $\dfrac{3}{5}$. x + $\dfrac{3}{5}$. 2 = 3 }$
    $\Rightarrow$ $\text{ x. ( $\dfrac{1}{2}$ + $\dfrac{3}{5}$ ) + $\dfrac{6}{5}$ = 3 }$
    $\Rightarrow$ $\text{ x. $\dfrac{11}{10}$ = 3 – $\dfrac{6}{5}$ }$
    $\Rightarrow$ $\text{ x. $\dfrac{11}{10}$ = $\dfrac{9}{5}$ }$
    $\Rightarrow$ $\text{ x = $\dfrac{9}{5}$ : $\dfrac{11}{10}$ }$
    $\Rightarrow$ $\text{ x = $\dfrac{18}{11}$ }$
      $\text{ Vậy x = $\dfrac{18}{11}$ }$
     

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