Jawabanmu

2014-05-16T13:32:53+07:00
K jajar genjang = jumlah semua sisi
110 = 4x-5 + 80-6x + 4x-5 + 80-6x
110 = 4x +4x -6x - 6x -5 -5 +80 +80
110 = 8x -12x -10 +160
110 +10 - 160 = -4x
-40 = -4x
10 = x

4(10) - 5 = 40 - 5 = 35
80 - 6(10) = 80 - 60 = 20

L jajar genjang = 35 x 20 = 700
2014-05-16T13:34:58+07:00
2 (4x-5+80-6x) = 110
-2x + 75 = 110/2
- 2x + 75 = 55
2x = 75-55
2x = 20 -> x = 10
AB = 4.10 -5 = 40-5= 35 cm
Iuas = 35 x 14 = 490 cm2
nilai x nya yg mna ?
maaf2, x nya bIm dibagi 2, maaf2, keIewat,,
x -> 10