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数学
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2(t+3)-1=5(2-3t),
人气:345 ℃ 时间:2020-03-21 07:29:02
解答
2(t+3)-1=5(2-3t)
2t+6-1=10-15t
2t+15t=10-5
17t=5
t=5/17
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