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

Toán Lớp 6: 3 x ( X – 1/2 ) – 5 x ( X + 3/5 ) = -X + 1/5 -5 x ( X + 1/5 ) – 1/2 x ( X – 2/3 ) = 3/2 x ( – 5/6 )

Home/ Toán Lớp 6: 3 x ( X – 1/2 ) – 5 x ( X + 3/5 ) = -X + 1/5 -5 x ( X + 1/5 ) – 1/2 x ( X – 2/3 ) = 3/2 x ( – 5/6 )

Toán Lớp 6: 3 x ( X – 1/2 ) – 5 x ( X + 3/5 ) = -X + 1/5 -5 x ( X + 1/5 ) – 1/2 x ( X – 2/3 ) = 3/2 x ( – 5/6 )

Tháng Hai 19, 2023 Toán học 2 Comments 0 views

Toán Lớp 6: 3 x ( X – 1/2 ) – 5 x ( X + 3/5 ) = -X + 1/5
-5 x ( X + 1/5 ) – 1/2 x ( X – 2/3 ) = 3/2 x ( – 5/6 )

Comments ( 2 )

  1. diemmyhoa
    diemmyhoa
    19 Tháng Hai, 2023 at 6:49 chiều
    Reply
    3 xx (x – 1/2) – 5 xx (x + 3/5) = -x + 1/5
    => 3 xx x – 3 xx 1/2 – 5 xx x – 5 xx 3/5 = -x + 1/5
    => 3 xx x – 3/2 – 5 xx x – 3 = -x + 1/5
    => 3 xx x – 5 xx x + x = 1/5 + 3/2 + 3
    => (3 – 5 + 1) xx x = 2/10 + 15/10 + 30/10
    => -x = 47/10
    => x = (-47)/10
    Vậy x = (-47)/10
    -5 xx (x + 1/5) – 1/2 xx (x – 2/3) = 3/2 xx ((-5)/6)
    => -5 xx x – 5 xx 1/5 – 1/2 xx x + 1/2 xx 2/3 = (-5)/4
    => -10/2 xx x – 1 – 1/2 xx x + 1/3 = (-5)/4
    => -10/2 xx x – 1/2 xx x = (-5)/4 + 1 – 1/3
    => x xx ((-10)/2 – 1/2) = (-15)/12 + 12/12 – 4/12
    => x xx (-11)/2 = (-7)/12
    => x = (-7)/12 : (-11)/2
    => x = 7/66
    Vậy x = 7/66

  2. baoquyen
    baoquyen
    19 Tháng Hai, 2023 at 6:49 chiều
    Reply
    Giải đáp+Lời giải và giải thích chi tiết:
    3×(x-1/2)-5×(x+3/5)=-x+1/5
    ⇔3×x-3/2-5×x-3+x-1/5=0
    ⇔-x=47/10
    ⇔x=-47/10
    Vậy x=-47/10
    $\\$  
    -5×(x+1/5)-1/2×(x-2/3)=3/2×(-5/6)
    ⇔-5×x-1-1/2×x+1/3+5/4=0
    ⇔-11/2×x+ 7/12=0
    ⇔-11/2×x=-7/12
    ⇔x=7/66
    Vậy x=7/66

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

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