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

Toán Lớp 6: 5/7-3/7 X=0,25 tìm X nha anh chị

Toán Lớp 6: 5/7-3/7 X=0,25 tìm X nha anh chị

Comments ( 2 )

  1. 5/7 – 3/7x = 0,25
    ⇒ 5/7 – 3/7x = 1/4
    ⇒ 3/7x = 5/7 – 1/4
    ⇒ 3/7x = 20/28 – 7/28
    ⇒ 3/7x = 13/28
    ⇒ x = 13/28 : 3/7
    ⇒ x = 13/12

  2. 5/7- 3/7 x = 0,25
    5/7 – 3/7 x = 1/4
    3/7 x = 5/7 – 1/4
    3/7 x = 13/28
    x = 13/28 :3/7
    x= 13/12
    Vậy x = 13/12

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

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