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2x + 3y = 1 |x3| 6x + 9y = 3
-----------------(-)
-5y = 5
y = -1
2x+3y = 1
2x + 3(-1) = 1
2x = 1+3
2x = 4
x = 2
HP = {2,-1}
2x + 3y = 1 di kalikan 3
menjadi
6 x + 4 y = 8
6 x + 9y = 3 _
-5y = 5
y = -1
3x + 2y = 4
3x + 2(-1) =4
3x = 4 + 2
3x = 6
x = 2
hp= (2, -1)