Jawabanmu

2014-04-27T23:53:45+07:00
Mair.cair.(100-T)=mes.Les+mes.cair(T-0)+mes.0,0017.20
10.1.(100-T)=20.80+20.1.T+20.0,0017.20
1000-10T=1600+20T+0,071
30T=559,92
T=19,99 C
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