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

Toán Lớp 5: tìm x a, 96 – 3 . ( x + 1 ) = 42 2 phút

Toán Lớp 5: tìm x
a, 96 – 3 . ( x + 1 ) = 42
2 phút

Comments ( 2 )

  1. 96 – 3 . ( x+1)=42
    3.(x+1) = 96-42
    3.(x+1) = 54
    x+1 = 54 : 3
    x+1 = 18
    x=18-1
    x=17
    Vậy x = 17
     

  2. Đề bài : 96 – 3 . (x + 1) = 42
    ⇔ 3 . (x + 1) = 96 – 42
    ⇔ 3 . (x + 1) = 54
        x + 1 = 54 ÷ 3
        x + 1 = 18
        x = 18 – 1
        x  = 17
     

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