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Luas bangun Δ hasil 12x + 5y < 60 dan x,y >0 , L = 1/2 (12x5) = 30
Luas Δ hasil dilatasi |5..0||0..5| dan T|1..1||-5..5|
= det D x Det T x L
= 25 x 10 x 30
= 7.500