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1/x + 4/x = 3 dikalikan 2
2/x + 3/y = 2
2/x + 8/y = 6
dikurangi
-5/y = -4
y = 1,25
cari nilai x tinggal di masukkan
2/x + 3/y = 2
2/x + 3/1,25 = 2
2/x + 2,4 = 2
pindah ruas yang 2,4 jadi negatif
2/x =-0,4
x = -5
jadi hasil dari ( x,y ) = (-5 ; 1,25)
jadikan yang terbaik ya..hehe