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(x-27.8%x)-27.8%x=1600怎么解
人气:491 ℃ 时间:2020-02-05 07:43:53
解答
(x-27.8%x)-27.8%x=1600
(100%-27.8%-27.8%)x=1600
44.4%x=1600
x=3603.6
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