Jawabanmu

2014-02-27T19:44:13+07:00
Jawaban paling cerdas!
2014-02-27T19:45:32+07:00
Di kali silang jadi
(x+3)x5    40x2 
5x+15=80
5x=80-15
5x=65
x=13


40;(13+3)=5;2
40;16=5;2
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