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6y + 10x = -xy ...pers (1)
4/x + 25/y = 3 ---> × xy
4y + 25x = 3xy ... pers (2)
pers 1 dan 2 dieliminasi
6y+10x=-xy |×2| 12y+20x=-2xy
4y+25x=3xy |×3| 12y+75x=9xy
---------------------------------(-)
- 55x = -11xy
-55 = -11y
y = 5
6y + 10x = -xy
6.5 + 10x = - x.5
30 + 10x = - 5x
30 = -5x - 10x
30 = -15x
x = -2