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基础代数/线（线性函数）/章节测验
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来自维基教科书，为开放世界提供开放书籍
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基本代数
请以这种方式发布您的测试问题
问题：(答案、难度级别（容易、中等、困难）)
示例 2x=6: (x=3，容易)
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书籍：基本代数
华夏公益教科书
