X-8分之3X=3分之5解方程

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X-8分之3X=3分之5解方程
X-8分之3X=3分之5解方程

X-8分之3X=3分之5解方程
x-3/x=5/3
2/3x=5/3
x=5/3÷2/3
x=2.5
(1-1/4-1/5)x=550
x=550÷11/20
x=1000

x-3/8x=5/3
5/8x=5/3
x=5/3*8/5
x=2又2/3
(1-1/4-1/5)x=550
11/20x=550
x=550*20/11
x=1000

1)
8x/8-3x/8=5/3
(8x-3x)/8=5/3
5x/8=5/3
x=5/3×8/5
x=8/3
2)
(20/20 -5/20-4/20)x=550
(20-5-4)/20 x=550
11/20 x=550
x=550×20/11
x=1000

  1. x-3x/8=5/3

        5x/8=5/3

          x=5/3*8/5

     &nb...

全部展开

  1. x-3x/8=5/3

        5x/8=5/3

          x=5/3*8/5

          x=8/3

2.(1-1/4-1/5)x=550

    11x/20=550

        x=550*20/11

        x=1000

收起

1)原式可化为5/8x=5/3,解得x=8/3
2)原式可化为11/20x=550,解得x=1000

  1. (8/8-3/8)x=5/3 

    5/8x=5/3

    x=5/3*8/5

    x=8/3

  2. (20/20-5/20-4/20)x=550

    11/20x=550

    x=550*20/11

    x=1000