消元解方程组
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 12:03:37
解下列方程组 (1) { x /3 +y /5=1 , 3(x +y) + 2(x - 3y) =15 (2){ x + y=60 ,30% ·x+60% ·y=10% 乘以 60
解题思路: 分母化为1,加减消元法可求。
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