36个人要去旅游,有3种旅游线路价格,A:3000元/人,B:2000元/人,C:1250元/人,要花完50250元,刚

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  • 设x人选A,y人选B,36-x-y人选C3000x+2000y+1250(36-x-y)=50250化简12x+8y+5(36-x-y)=20112x+8y+180-5x-5y=2017x+3y=31x=(31-3y)/7x、y、36-x-y都是正整数,解不定方程当y=1时,x=4,36-x-y=31当y=8时,x=1,36-x-y=27...