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x=12-y masukan k persamaan 2
2x-z=13
2(12-y)-z=13
24-2y-z=13
-2y-z=13-24
-2y-z=-11
-2y-z=-11 kalikan 2 jd -4y-2z=-22 spy bs d eliminasi dg pers 3
maaf kl blm tntas coz buru2 mo brgkt skul
bs nerusin ndiri g?