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x+2y = 8 |x1 | x+2y = 8
2x -y = 6 |x2 | 4x-2y =12 +
--------
5x = 20
x = 4
selanjutnya mencari nilai y dgn subsitusi
x + 2y = 8
4 + 2y = 8
2y = 4
y =2