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数学
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2.5x-0.6=1.3x
人气:350 ℃ 时间:2020-05-24 03:54:14
解答
2.5x-0.6=1.3x
2.5x-1.3x=0.6
1.2x=0.6
x=0.6÷1.2
x=0.5
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