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

Toán Lớp 6: Tìm x biết 10 < x < 30 và x là số nguyên

Toán Lớp 6: Tìm x biết 10 < x < 30 và x là số nguyên

Comments ( 2 )

  1. 10 < x < 30(x∈Z)
    ⇒x∈{11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29}
    Vậy x∈{11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29}

  2. 10 < x < 30 (x in Z)
    ⇒x in {11; 12; 13; 14; 15; 16; 17; 18; 19;20; 21; 22; 23; 24; 25; 26; 27;28 ;29}

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

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