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x+2y+ 2z = 90.000
2x+2y+3z = 130.000
2x+2y+z = 70.000 (x1) 2x+2y+z = 70.000
x+2y+2z = 90.000 (x2) 2x+4y+4z = 180.000
-2y - 3z = -110.000
2x+2y+z = 70.000
2x+2y+3z=130.000
-2z = -60.000
z = 30.000
-2y -3z = -110.000
-2y - 3(30.000) = -110.000
-2y - 90.000 = -110.000
-2y = -20.000
y = 10.000
jadi harga jeruk 1 kg = 10.000
= 2 : 2 : 1 = 70.000
Mangga = 2/5 x 70.000 = Rp. 28.000 / 2 = Rp. 14.000
Anggur = 1/5 x 70.000 = Rp. 14.000
Jeruk = 2/5 x 70.000 = Rp. 28.000 / 2 = Rp. 14.000
Jadi harga 1 Kg Jeruk = Rp. 14.000