某分子与分母的和是91,约分得七分之六,约分前这个分数是几分之几?
某分子与分母的和是91,约分得七分之六,约分前这个分数是几分之几?
数学人气:209 ℃时间:2019-10-19 22:18:22
优质解答
13x=91,x=7,42/49
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