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数学
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5.5x-3.5x=20 怎么解
人气：216 ℃ 时间：2020-04-07 10:45:04
解答
5.5x - 3.5x = 20
(5.5 - 3.5)x = 20
2x = 20
x = 20÷2
x = 10
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