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11/12x-12%x=6.5
人气:108 ℃ 时间:2020-04-04 09:28:20
解答
11/12x-12%x=6.5
(11/12-12%)x=6.5
(550-72)x/600=6.5
478x=3900
x=3900/478=1950/239
x=1950/239
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