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

Toán Lớp 6: Tìm số nguyên x biết : a\ 5 : [ x+ 1] b\ 15 : [2.x + 1]

Toán Lớp 6: Tìm số nguyên x biết :
a\ 5 : [ x+ 1] b\ 15 : [2.x + 1]

Comments ( 1 )

  1. a)5vdotsx+1
    =>x+1in Ư(5)
    =>x+1={+-1;+-5}
    =>x={0;-2;4;-6}
    b)15vdots(2.x+1)
    =>2.x+1in Ư(15)
    =>2.x+1={+-1;+-3+-5;+-15}
    =>2.x={0;-2;2;-4;4;-6;14;-16}
    =>x={0;-1;1;-2;2;-3;7;-8}
     

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

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