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

Toán Lớp 5: Tìm X biết: X x 10 + X : 0,1 = 3

Toán Lớp 5: Tìm X biết: X x 10 + X : 0,1 = 3

Comments ( 2 )

  1. x xx 10+x:0,1=3
    =>x xx 10+x xx 10=3
    =>x xx (10+10)=3
    =>x xx 20=3
    =>x xx =3:20
    =>x= 3/20
    Vậy x=3/20

  2. x times 10 + x : 0,1 = 3
    x times 10+x : 1/10=3
    x times 10+ x times 10=3
    x times (10+10)=3
    x times 20=3
    x= 3/20
     

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