Jawabanmu

2014-03-10T20:47:24+07:00
Lebar = x
panjang = 2x-3
kell = 36 cm

2x + 2(2x-3) = 36
2x + 4x-6 = 36
6x - 6 = 36
6x = 30
x = 5

panjang = 2(5)-3 = 12

luas = 5 X 12 = 60

2014-03-10T20:52:36+07:00
K= 2(p+L)
36=2(3+L)
36=6+2L
30=2L
L=15

L=p x l = 3 x 15 = 45 cm