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4x - 2y= -6
2x + y= 5 |×2|
4x - 2y= -6 |×1|
4x + 2y= 10
4x - 2y= -6 _
4y= 16
y= 16/4
y= 4
2x + y= 5
2x + 4= 5
2x= 5 - 4
2x= 1
x= 1/2
hp= {1/2,4}
hp= himpunan penyelesaian