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数学
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解方程:6.8-1.2x=6.5 42+3x=69 6.5×8+5x=79 1、y的5倍减去y的2倍的差是2.4,求y.
人气:188 ℃ 时间:2020-02-03 20:36:34
解答
—0.25 9 5.4 y=0.8
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