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

Toán Lớp 5: tìm x biết: x: 1/8 + x : 1/5 – x : 1/3=490

Toán Lớp 5: tìm x biết: x: 1/8 + x : 1/5 – x : 1/3=490

Comments ( 2 )

  1. text{#Orca}
    x : 1/8 + x : 1/5 – x : 1/3 = 490
    x . 8 + x . 5 – x . 3 = 490
    x . (8 + 5 – 3) = 490
    x . 10 = 490
    x = 490 : 10
    x = 49

  2. \color{green}{\text{@BerryLinh}}
    x : 1/8 + x : 1/5 – x : 1/3 = 490
    x  \times 8 + x \times 5 – x \times 3 =490
    x  \times ( 8 + 5 – 3)  = 490
    x \times 10 =490
    x = 490 : 10
    x= 49
     

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

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