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84 = 2.(14x)
84 = 28x
x = 3
p = 27
l = 15
jadi p.l = 27.15 = 405
84 = 2.9x + 2.5x
84 = 18x + 10x
84 = 28x
3 = x
panjang = 9x
= 9.3 =27 m
lebar = 5x
= 5.3 = 15 m
luas = p.l
= 27 .15
= 405 m2