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100.000x + 75.000y = 27.500.000 (:25.000) = 4x + 3y = 1.100
x + y = 300 (x3) 3x + 3y = 900
4x + 3y = 1.100 (x1) 4x + 3y = 1.100 (-)
------------------------------------
-x = -200
x = 200
jawabannya 19 === 200 lembar
no 20 gak ada jawaban
sisi diagonal ac = akar 32kuadrat + 24 kuadrat
ac= akar 1600
ac=40
sisi miring = 1/2 x 40
=20