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Diket : 8x+6y=22.000, 6x+5y=17.000
Ditanya : 5x+8y ?
Dijawab
8x+6y=22.000......pers1
6x+5y=17000.....pers2
Eliminasi pers 1 dan 2
40x+30y=110.000 (dikali 5)
36x+30y=102.000(dikali 6)
------------------------- -
4x=8000
x=2000
6x+5y=17.000
12.000+5y=17.000
5y=5000
y=1000
5x+8y
=5.2000+8.1000
=10.000+8000
=18.000