Jawabanmu

2014-05-20T14:50:58+07:00
Krn belah ketupat ciri2nya semua sisi sama, maka 5x-6 = 2x+12 <=> 5x-2x = 6+12 <=> 3x = 18, x = 6
MN=LM <=> MN = 2x+12 <=> MN = 12+12 = 24
2014-05-20T15:21:51+07:00
5x-6=2x+12
5x-2x=12+6
3x=18
x=18:3
x=6

MN=LM=2x+12
           =2(6)+12
           =12+12
           =24
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