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

Toán Lớp 7: Tìm x nguyên biết: /5(2x + 3)/ + /2(2x + 3)/ + /2x + 3/ = 16

Toán Lớp 7: Tìm x nguyên biết:
/5(2x + 3)/ + /2(2x + 3)/ + /2x + 3/ = 16

Comments ( 1 )

  1. Bạn kham khảo
    |5(2x + 3)| + |2(2x + 3)| + |2x + 3| = 16
    <=>5|2x+3|+2|2x-3|+|2x+3|=16
    <=>(5+2+1).|2x+3|=16
    <=>8|2x+3|=16
    <=>|2x+3|=2
    <=>[(2x+3=2),(2x+3=-2):}
    <=>[(2x=-1),(2x=-5):}
    <=>[(x=-1/2),(x=-5/2):}
    Vậy x={-1/2;-5/2}

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

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