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6x-y=-5 |×2 | 12x-2y=-10
3x-2y=-5 |×1 | 3x-2y=-5
________ -
9x = -5
x=-5/9
6x-y=-5
6 (-5/9)-y=-5
-30/9-y=-5
-30/9+5=y
(-30+45)/9=y
15/9=y
jadi himpunan penyelesaiannya adalah (-5/9,15/9)