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3y/xy + 4x/xy = xy/xy
2/x - 1/y = 8. samakan penyebutnya
2y/xy - 1x/xy = 8xy/xy
> dapat 2 persamaan
3y + 4x = 1.......(1)
2y - 1x = 8........(2)
eliminasi x, (1) dikali 1 (2) dikali 4
3y+4x = 1
8y-4x = 32
__________+
11y = 33
y = 3
subtitusi y
2y-1x = 8
2(3) - 1x = 8
6 - 1x = 8
-x = 2
x= -2
(x,y)
(-2,3)
jawabannya c