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6X-10Y+3X+27Y = 43
9X+17Y = 43......persamaan 1
3(X+2Y) + 4X-Y = 17
3X+6Y+4X-Y = 17
7X+5Y= 17.......persamaan 2
Eliminasi :
9X+17Y=43 .............dikalikan 7
7X+5Y=17 ...............dikalikan 9
menjadi :
63X+119Y=301
63X+ 45Y=153 -
74Y=148
Y=2
SUBTITUSI :
9X+17Y=43
9X+17 (2)=43
9X+34 =43
9X=43-34
9X=9
X=1