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

Toán Lớp 5: Tìm X 5,75 + × X1,25 = 16,5 :2 Biết X= nhân × = X ( ích )

Toán Lớp 5: Tìm X
5,75 + × X1,25 = 16,5 :2
Biết
X= nhân
× = X ( ích )

Comments ( 2 )

  1. 5,75 + x×1,25 = 16,5 :2
    5,75 +x×1,25 = 8,25
    => x×1,25 = 8,25 – 5,75
    => x×1,25 = 2,5
    => x = 2,5 : 1,25
    => x = 2

  2. $5,75 + x × 1,25 = 16,5 : 2$
    $⇔ 5,75 + 1,25x = 8,25$
    $⇔ 1,25x = 8,25 – 5,75$
    $⇔ 1,25x = 2,5$
    $⇔ x = 2$
    Vậy $x=2$
     

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