Himpunan penyelesaian dari sistem persamaan
2x + 3y - 2 = 0
x - y - 1 = 0
2x + 3y - 2 = 0
x - y - 1 = 0
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u - y = 1 -> dikalikan 2
menjadi :
2u + 3y = 2
2u - 2y = 2 _ dikurangi
5y = 0
y = 0
2u + 3y = 2
2u + 3(0) = 2
2u = 2
u = 1