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

Toán Lớp 7: Tìm `x` `c) `3`4/5 ` : 40`8/15 ` = 0,25 : x `d) ` `5/6 ` : x = 1`7/9 ` : 0,2

Toán Lớp 7: Tìm x
c) 34/5 : 408/15 = 0,25 : x
d) 5/6 : x = 17/9 : 0,2

Comments ( 2 )

  1. c) 3 4/5 : 40 8/15 = 0,25 : x
    => 19/5 : 608/15 = 1/4 : x
    => 19/5x = 1/4. 608/15
    => 19/5x = 152/15
    => x = 152/15 : 19/5
    => x = 8/3
    d)5/6:x=1 7/9:0,2
    =>(5/6)/x=(16/9)/(0,2)
    =>x=(5/6. 0,2)/(16/9)
    =>x=3/32

  2. c) 3 4/5 : 40 8/15 = 0,25 : x
    -> 19/5 : 608/15 = 1/4 : x
    -> 19/5x = 1/4. 608/15
    -> 19/5x = 152/15
    -> x = 152/15 : 19/5
    -> x = 8/3
    Vậy x = 8/3
    d)
    5/6:x=1 7/9:0,2
    ->(5/6)/x=(16/9)/(0,2)
    ->x=(5/6. 0,2)/(16/9)
    ->x=3/32
    Vậy x=3/32

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

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