当a=_时,(68-5a)÷3=0;当a=_时,(68-5a)÷3=5.
问题描述:
当a=______时,(68-5a)÷3=0;当a=______时,(68-5a)÷3=5.
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;...