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x - 2y = 10
3x + 2y = -2
- - Jumlahkan - -
4x = 8
x = 2
Dan, didapat:
2 - 2y = 10
2y = 2 - 10
2y = -8
y = -4
Sehingga, selesaian:
(2,-4)
3x + 2y = -2 | x1 | 3x + 2y = -2 -
-8y = 32
y = 32 : -8
y = -4
x-2y=10
x- 2.-4 = 10
x+8=10
x=10-8
x=2
x-2y=10
2-2.-4=10
2+8=10(betul)
3x + 2y = -2
3.2 + 2.-4 =-2
6-8 = -2 (betul)