Jawabanmu

2014-04-05T08:07:17+07:00
K=2(p+l) 36= 2({3x-4}+{x+2}) 36= 2(4x-2) 36= 8x-4 36+4=8x 40=8x x=5 l=x+2 l=5+2 l=7
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2014-04-05T08:13:36+07:00
Keliling =2 (p+l)""""""""""""2 (3x-4+x+2)=36""""""""2 (4x-2)=36""""""""""8x-4=36""""""""""""8x=36+4"""""""""8x=40"""""""x=5