假设法解题 如下~
Mr.Lee makes tables with three legs and four legs.one week he used 64 legs to make 18 tables.how many tables of each kind did he make?
李先生做三腿和四条腿的桌子,一周下来他用了64条腿做了18个桌子.请问三条腿的桌子和四条腿的桌子各做了几个?
人气：115 ℃ 时间：2020-06-15 23:06:30
解答
设3条腿的X个,4条腿的Y个,
x y=18
3x 4y=64
得3条的8个4条的10个
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