鸡兔同笼,鸡比兔多12只,共有腿102条,鸡,兔各有多少只
题目
鸡兔同笼,鸡比兔多12只,共有腿102条,鸡,兔各有多少只
答案
设鸡x只 则兔子 x-12
2x+4(x-12)=102
2x+4x-48=102
6x=150
x=25
兔子有 25-12=13只
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