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35 m = 6y - 2 - 4y - 1
35 m = 2y - 3
-2y = -3 - 35
-2y = -38
y = 19
panjang = 6(19) - 2
114 - 2 = 112 m
lebar = 4(19) + 1
76 = 1 = 77 m
luas = 2(112 + 77)
2(189) = 378 m²