问题描述: 若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于【】 1个回答 分类:数学 2014-10-31 问题解答: 我来补答 3x+5y+6z=5,4x+2y+z=2将以上两式相加得:7x+7y+7z=7所以x+y+z=1 再问: 明白了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 再答: 不客气:) 展开全文阅读