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当a=______时,(68-5a)÷3=0;当a=______时,(68-5a)÷3=5.
人气:469 ℃ 时间:2020-06-05 18:10:57
解答
(1)因为0除以一个不为0的数得0,所以68-5a=0, 5a=68, a=13.6.答:当a=13.6时,(68-5a)÷3=0;(2)由题意得:68-5a=15, 5a=68-15, a=10.6;...
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