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

Toán Lớp 5: tìm x:7/13:x+1=35/16 b. x:1/3=1/2+1/3 c. /x-2/3/:2/5=7/10 giúp em với

Toán Lớp 5: tìm x:7/13:x+1=35/16 b. x:1/3=1/2+1/3 c. /x-2/3/:2/5=7/10 giúp em với

Comments ( 2 )

  1. $a)$
    7/13:x+1=35/16
    7/13:x=35/16-1
    7/13:x=19/16
    x=7/13:19/16
    x=112/247
    $b)$
    x:1/3=1/2+1/3
    x:1/3=5/6
    x=5/6×1/3
    x=5/18
    $c)$
    (x-2/3):2/5=7/10
    x-2/3=7/10×2/5
    x-2/3=7/25
    x=7/25+2/3
    x=71/75

  2. a)x:7/13+1=35/16 
    x:7/13=35/16-1
    x:7/13=19/16
    x=19/16xx7/13
    x=133/208 
    b)x:1/3=1/2+1/3
    x:1/3=5/6
    x=5/6xx1/3
    x=5/18
    c)(x-2/3):2/5=7/10
    x-2/3=7/10xx2/5
    x-2/3=7/25
    x=7/25+2/3
    x=71/75

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

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