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

Toán Lớp 7: 2,7:(2x)=11/5:3 2/3 giup mik ak

Toán Lớp 7: 2,7:(2x)=11/5:3 2/3
giup mik ak

Comments ( 2 )

  1. Giải đáp:
    $\\$
    2,7 ÷ (2x) = 11/5 ÷ 3 2/3
    -> 27/10 ÷ (2x) = 11/5 ÷ 11/3
    -> 27/10 ÷ (2x) = 11/5 × 3/11
    -> 27/10 ÷ (2x) = 3/5
    -> 2x = 27/10 ÷ 3/5
    -> 2x = 27/10 × 5/3
    -> 2x = 9/2
    ->x=9/2÷2
    ->x=9/2×1/2
    ->x=9/4
    Vậy x=9/4
     

  2. 2,7:2x=11/5:3 2/3
    ⇒27/10:2x=11/5:11/3
    ⇒27/10:2x=11/5. 3/11
    ⇒27/10:2x=33/55
    ⇒27/10:2x=3/5
    ⇒2x=27/10:3/5
    ⇒2x=27/10. 5/3
    ⇒2x=135/30
    ⇒2x=9/2
    ⇒x=9/2:2
    ⇒x=9/2. 1/2
    ⇒x=9/4
    Vậy x=9/4.
    Kiểm tra:
    2,7:(2.9/4)=3/5
    11/5:3 2/3=3/5
    =>Bài trên đúng.

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