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

Toán Lớp 6: tìm x biết : 1/4 +1/3 ÷3 x = – 5

Toán Lớp 6: tìm x biết : 1/4 +1/3 ÷3 x = – 5

Comments ( 2 )

  1. 1/4+1/3:3x=-5
    1/4+1/9x=-5
    1/9x=5-1/4
    1/9x=-21/4
    x=-189/4
     

  2. 1/4+1/3:3x=-5
    ->1/4+1/3 . 1/3x=-5
    ->1/4+1/9x=-5
    ->1/9x=5-1/4
    ->1/9x=-21/4
    ->x=-21/4:1/9
    ->x=-189/4
    Vậy x=-189/4
     

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