方程:1)x/10=4.5/0.82)0.7:x=12:243)4:1又2/3=x:0.54)x-1/4x=24+1/8x5)x-3/3=x-5/66)(x-2)×3=百分之25+1/4x1)袋子里有红、黑两种球,红球比黑球的三倍多两个,每次从袋子里取出4个红球和2个黑球,袋子里剩
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 12:14:30
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