若一头大象和2匹马和1只熊猫等于6吨,一头大象加2匹马加6只熊猫等于8吨,那么一只熊猫的体重是多少
人气：301 ℃ 时间：2019-08-22 11:25:49
解答
设大象为x,马为y,熊猫为z
则x+2y+z=6 x+2y+6z=8得5z=2z=0.4当然单位是吨
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