1.Considerthefirstequation:Threepairsofredsportsshoesequal30.Fromthis,wededucethatonepairofredsportsshoesisequalto30dividedby3,whichis10.Therefore,oneredsportsshoeisequalto10dividedby2,whichis5.2.Thesecondequationstatesthattwopeoplewhodidnotbuyicecreamalsodidnotwearredshoes,plusthepersonwhoownsapairofredshoes,theirtotalvalueequals20.Iftwopeoplewithnothingareworth10,thenthepersonwithapairofredshoesisworth20minus10,whichis10.3.Thethirdequationis:Twoicecreamsplusapersonwhoboughtnothingtotal13.Apairoficecreamsisworth8,sotwopairsoficecreamsareworth8times2,whichis16.Addingthevalueofthepersonwhoboughtnothing(2)tothis,weget18,not13.Theremaybeanerrorhere,asaccordingtotheequation,thetotalvalueoftwopairsoficecreamsandapersonshouldbe20(16+4),andifthispersonistheonewhodidn'tbuyicecream,theirvalueshouldbe2.4.Usingtheinformationfromabove,weget:5+(5+10+4)x2=5+24=29,not43.Thereisalsoanerrorhere,asaccordingtotheequation,itshouldbe5+(5+10+2)x2=5+34=39.Summary:Afterrefiningandcorrectingtheerrors,weshouldnoticethespecificnumbersandlogicalrelationshipsineachequationtoensurethateverycalculationisaccurate.