二元一次方程·足球
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/18 18:54:44
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解题思路: 设白皮有x块,黑皮有y块,则x+y=32,每块白皮有六条边,共6x条边。 又因为每块白皮有3条边与黑边连在一起,所以黑皮只有3x条边,而黑皮共有边数为5y, 得出另一个方程5y=3x,两方程联立,得x=20,y=12,即有黑色块12块,白色块20块。
解题过程:
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最终答案:略
解题过程:
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最终答案:略