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

Toán Lớp 6: a)(2/3-x)x1/3=2/5 b)x :144-23=121 c) (2 × x+1)x2,86=35,464 tìm x:

Toán Lớp 6: a)(2/3-x)x1/3=2/5
b)x :144-23=121
c) (2 × x+1)x2,86=35,464
tìm x:

Comments ( 2 )

  1. a)(2/3-x).1/3=2/5
    2/3-x=2/5: 1/3
    2/3-x=2/5 .3
    2/3-x= 6/5
    x=2/3-6/5
    x=-8/15
    b)x:144-23=121
    x:144=121+23
    x:144=144
    x=144.144
    =20736
    c)(2.x+1).2,86=35,464
    2x+1=35,464:2,86
    2x+1=12,4
    2x=11,4
    x=11,4:2
    x=5,7
     

  2. ~ Bạn tham khảo ~
    a) (2/3-x) xx 1/3 = 2/5
    (2/3-x) = 2/5 : 1/3
    (2/3-x) = 2/5 xx 3
    2/3-x = 6/5
    x = 2/3 – 6/5
    x= 10/15 – 18/15
    x=-8/15
    Vậy x = -8/15
    b) x : 144 – 23 = 121
    x : 144 = 121 + 23
    x : 144  = 144
    x = 144 xx 144
    x = 20736
    Vậy x = 20736
    c) (2xxx+1) xx 2,86 = 35,464
    (2xxx+1) = 35,464 : 2,86
    (2xxx+1) = 12,4
    2xxx = 12,4 -1
    2xxx = 11,4
    x = 11,4 : 2
    x = 5,7
    Vậy x = 5,7
    $#Vịt vàng$

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

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