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

Toán Lớp 5: TÌM y: y + y x 2/3 : 7/9 + y : 7/2 = 45

Toán Lớp 5: TÌM y:
y + y x 2/3 : 7/9 + y : 7/2 = 45

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết

    toan-lop-5-tim-y-y-y-2-3-7-9-y-7-2-45

  2. y + y xx 2/3 : 7/9 + y : 7/2 = 45
    y + y xx 2/3 xx 9/7 + y xx 2/7 = 45
    y + y xx 6/7 + y xx 2/7 = 45
    y xx ( 1 + 6/7 + 2/7) = 45
    y xx 15/7 = 45
    y = 45 : 15/7
    y = 21
    Bạn tham khảo!
     

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