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

Toán Lớp 5: Tìm y, biết: y x 13 + y x 7 = 24.

Toán Lớp 5: Tìm y, biết: y x 13 + y x 7 = 24.

Comments ( 2 )

  1. yxx13+yxx7=24
    yxx(13+7)=24
    yxx20=24
    y=24:20
    y=1,2
    Vậy x=1,2

  2. x × 13 + y × 7 = 24
    y × (13 + 7) = 24
    y × 20 = 24
    y = 24 : 20
    y = 6/5
    Vậy: y = {6/5}

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