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

Toán Lớp 7: 2,6 + 5,2.x = 3,16 .x – 5,6 Tìm x

Toán Lớp 7: 2,6 + 5,2.x = 3,16 .x – 5,6
Tìm x

Comments ( 2 )

  1. 2,6+5,2.x=3,16.x-5,6
    =>5,2x-3,16x=-5,6-2,6
    =>2,04x=-8,2
    =>x=(-0,82):2,04
    =>x=-(205)/51
    Vậy x=-(205)/51.

  2. 2,6 + 5,2x = 3,16x – 5,6
    2,6 + 5,2x – (3,16x – 5,6) = 0
    2,6 + 5,2x – 3,16x + 5,6 = 0
    2,6 + 2,04x + 5,6 = 0
    2,04x + 8,2 = 0
    2,04x = -8,2
    x = -205/51
    Vậy x = -205/51
    Gửi bạn!
     

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