Jawapan

Jawapan Paling Bijak!
2016-07-21T06:02:28+08:00
Leela=k
her brother=k-3
her father=2×(k-3)

k+(k-3)+2 (k-3)=s
k+k-3+2k-6=s
4k-9=s

formula: 4k-9=s
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