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

Toán Lớp 6: 3/2 + 6/7: x = 2/ 5 Tìm x là phân số

Toán Lớp 6: 3/2 + 6/7: x = 2/ 5
Tìm x là phân số

Comments ( 2 )

  1. Giải đáp:
     $\dfrac{3}{2}+\dfrac{6}{7}:x=\dfrac{2}{5}$
    $⇔ \dfrac{6}{7}:x= \dfrac{2}{5}-\dfrac{3}{2}$
    $⇔ \dfrac{6}{7}:x=\dfrac{-11}{10}$
    $⇔ x= \dfrac{6}{7}:\dfrac{-11}{10}$
    $⇔ x= \dfrac{-60}{77}$
    $vậy$ $x=\dfrac{-60}{77}$
     

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