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

Toán Lớp 7: nếu -8 : x = -12: 15 thì x =…

Toán Lớp 7: nếu -8 : x = -12: 15 thì x =…

Comments ( 2 )

  1. @Bao
    -8:x=-12:15
    ->-8:x=-0,8
    ->x=-8:-0,8
    ->x=10
     

  2. – 8 : x = – 12 : 15
    => – 8/x = – 12/15
    <=> – 12x = 15 . (- 8)
    <=> – 12x = – 120
    <=> x = 10
    #Ling
     

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

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