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

Toán Lớp 8: Tìm số nguyên x biết a) x+21=6

Toán Lớp 8: Tìm số nguyên x biết a) x+21=6

Comments ( 2 )

  1. Giải đáp:
     
    x+21=6
    x=6-21=-15
    vậy x=-15
     

  2. a)
    x + 21 = 6
    <=> x = 6 – 21
    <=> x = -15
      $\text{ Vậy x = 15 }$
     

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