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

Toán Lớp 6: LM HỘ E BÀI TÌM X NÀY VS Ạ: a, -7/5 x= 2/3 b, -36:x=30/7

Toán Lớp 6: LM HỘ E BÀI TÌM X NÀY VS Ạ:
a, -7/5 x= 2/3 b, -36:x=30/7

Comments ( 2 )

  1. a,
    -7/5x=2/3
    ⇔x=2/3: -7/5
    ⇔x=2/3. -5/7
    ⇔x=-10/21
    b,
    -36:x=30/7
    ⇔x=-36: 30/7
    ⇔x=-36. 7/30
    ⇔x=-42/5
     

  2. a, -7/5. x=2/3
                x= 2/3 : -7/5
                x= -10/21 
      vậy x= -10/21
    b, -36: x = 30/7
                x= -36 : 30/7
               x=-42/5
     vậy x=-42/5

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