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

Toán Lớp 7: -1/2+/x-2/5/=0,8 giúp mình nhé

Toán Lớp 7: -1/2+/x-2/5/=0,8 giúp mình nhé

Comments ( 1 )

  1. -1/2 + |x – 2/5| = 0,8
    => |x – 2/5| = 0,8 – (-1/2)
    => |x – 2/5| = 13/10
    Xét 2 TH:
    TH1: x – 2/5 = 13/10
    => x = 17/10
    TH2: x – 2/5 = -13/10
    => x = -9/10
    Vậy x = 17/10 hoặc x = -9/10

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