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apel = a
mangga = m
5a + 3m = 43000
2a + Xm = 40000 , a =
samakan jadi 40000
5a + 3m - 3000= 40000
5a +3m -3000 = 2a + Xm
3a + 3m - Xm = 3000
subtitusikan a
dikali 2 (biar nggak pecahan )
120000 - 3Xm + (6-2x)m = 6000
-3Xm + 6m - 2Xm = -114
-5Xm +6m = -114
m nya hilangin aja , kita disini nyari berapa banyak mangga yg dibeli dulu ,
maka x = 24 .
setelah tau mangga yg dibeli 24 buah , masukkan lagi ke fungsi , lanjut pake eliminasi / subtitusi spt biasa