X-X/3=80%怎么解,

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X-X/3=80%怎么解,
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X-X/3=80%怎么解,
X-X/3=80%怎么解,

X-X/3=80%怎么解,
X-X/3=80%
2/3x=4/5
x=4/5*3/2
x=6/5

X-X/3=80%
(1-1/3)X=4/5
(2/3)x=4/5
x=15/8


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X-X/3=80%
30x-1ox=24
2ox=24
x=24/2o
x=1.2

X-X/3=80%
3x-x=2.4
2x=2.4
x=2.4/2
x=1.2

X-X/3=80%
x*3-x/3*3=80%*3
3x-x=240%
2x=240%
x=240%/2
x=120%
x=1.2